7 BT VL7 Du CA Nam-HAY.13113

Tit 1

Tit 1 Ngy ........................

n tp: nhn bit nh sng, ngun sng v vt sng

A.Kin thc cn nh:

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B. Bi tp trc nghim:1: Cc cu sau ng hay sai?a. Vt c chiu sng l ngun sng.

b. Vt sng t n khng pht ra nh sng.

c. Vt c chiu sng khng phi l ngun sng.

d. Vt sng gm ngun sng v vt c chiu sng.

e. Mt ta nhn thy mt trng v mt trng t n pht ra nh sng.

f. Nh ca, cy ci, ngn nn .. l nhng vt sng.

g. Ngun sng c c im l truyn nh sng n mt ta.

2: Khi chiu nh sng n 1 vt t trong khng kh ( thy tinh) ta thy vt trong sut l v:

a. Vt hon ton khng cho nh sng n mt ta.

b. Vt khng nhn nh sng chiu n.

c. Vt phn chiu tt c mi nh sng.

d. C cc tia sng i n mt nhng mt khng nhn ra.

3. in t thch hp vo ch trng:

a. Ta nhn bit c nh sng khi ....................................................................

b. Khi mt ta nhn thy mt vt chng t..........................................................

C. Bi tp t lun1. Trong cc vt sau, u l ngun sng, u l vt sng?

a. Tri t b. Mt tri

c. Ngi sao d. Sao Mai

e. Sao chi g. Mt ngi.

2. n ng trong lp hc ang sng v trang sch em ang c ging nhau v khc nhau v im g theo Quang hc?

3. Trong thc t c nhng trng hp no ta khng th nhn thy mt vt t trc mt? Nguyn nhn chung ca cc trng hp l g?

4. Tm mt v d thc t chng t: Nu t vt khng c nh sng pht ra th mt khng nhn thy vt ? Tm mt v d thc t chng t: T vt c nh sng pht ra, nhng nh sng khng n c mt, th mt khng nhn thy vt ?

5. Ct in v ta nh trc mt ta. Ct in gn mt ta cn ta nh cui con ng. Nu ta ang nhm mt v sau m mt ra ta s thy vt no trc, ti sao? Tit 2 Ngy ........................

n tp: S truyn nh sng

A.Kin thc cn nh:

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B. Bi tp trc nghim:

1: Cc cu sau ng hay sai?a. nh sng bao gi cng truyn theo ng thng.

b. nh sng ch truyn theo ng thng trong mi trng trong sut v ng tnh.c. Cc ngun sng thng thng trong thc t to ra chm sng phn k.d. Khi ngun sng rt xa, chm sng ti ta l chm sng phn k.e. Cc th nghim 2.3 v 2.4 trong SGK thc s to ra c mt tia sng.

2: Hnh v no sau y biu din mt tia sng? . a. Hnh 1 b. Hnh 2 c. Hnh 3

3. Cho cc chm sng c biu din nh sau:

Hnh 1 Hnh 2 Hnh 3Chm sng song song, hi t, phn k c biu din ln lt l:

a. Hnh 1,2,3 b. hnh 2,3,1 c. Hnh 3,2,14. Chn cm t thch hp in vo ch trng:nh sng t dy tc bng n truyn i theo ng thng cho nn dng ng.. ta mi quan st thy bng n. A. rng v thng B. rng v cong

C. thng hoc cong D. khng trong sut

C. Bi tp t lun1. Hy chn cc t sau in vo ch trng: Ngun sng, vt sng.Khi xem chiu phim th lc u n tt, rp ti en. Sau my chiu chiu hnh nh ln mn hnh. Bng n my chiu l . Mn nh l nh sng t mn nh chiu ln gh, tng. Gh, tng tr thnh Mt khn gi thnh lnh m n pin tm kim mt vt b nh ri. n pin l .. cn vt b nh ri l 2. Qua phn khng kh pha trn mt ng la ang chy ta thy nh sng khng truyn i theo ng thng, ti sao?

3. Trong mt bui tp i ng, i trng h to ng trc thng. Bn i trng kim tra thng hng bng cch no? Tit 3 Ngy:.................

n tp: ng dng nh lut truyn thng ca nh sng

A.Kin thc cn nh:

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B. Bi tp trc nghim:

1. Cc cu sau ng hay sai?

A. Ngun sng rng to ra sau vt cn bng ti v bng na ti trn mn chn.

B. Chm sng sau khi hi t s tr thnh chm sng phn k.

C. Tia sng lun lun l ng thng.

D. Nht thc ton phn quan st c ch c bng ti ca tri t ln mt trng.

2. Trong cc phng m ca bnh vin ngi ta thng dng mt h thng gm nhiu n. Theo em mc ch chnh ca vic ny l g?

A. thu c nh sng mnh pht ra t cc bng n.

B. trnh cc hin tng xut hin cc bng en.

C. C 2 l do A v B u ng. D. C 2 l do trn u sai.3. Khi c nguyt thc th:A. Tri t b Mt trng che khut.

A. Mt trng b Tri t che khut.

A. Mt trng khng phn x nh sng na.

D. Mt tri khng chiu sng Mt trng che khut.4. Trong hai hin tng : nht thc , nguyt thc , hin tng no d quan st hn?

A: Hin tng nht thc d quan st hn

B: : Hin tng nguyt thc d quan st hn

C: C hai hin tng d quan st nh nhau

C. Bi tp t lun1. An v bnh nhn ln bu tri thy trng hnh li lim. Bnh ni l hin tng nguyt thc, nhng An qu quyt l khng phi. Nu An ng th theo em An cn c vo u?

2. V sao nguyt thc thng xy ra vo ngy rm v thi gian xy ra nguyt thc thng di hn nht thc?

3. Mt im sng S cch mn mt khong cch SH = 1m. Ti trung im M ca SH ngi ta t tm ba hnh trn, vung gc vi SH.

a- Tnh bn knh vng ti trn mn nu bn knh ba l R = 10 cm.

b- Thay im sng S bng mt hnh sng hnh cu c bn knh R = 2cm.

Tm bn knh vng ti v vng na ti. Tit 4 Ngy ................

n tp: nh lut phn x nh sng

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim:

I. Khoanh trn vo p n ng.

1. Hnh v no di y m t ng nh lut phn x nh sng?

A. Hnh a.

B. Hnh b.

C. Hnh c.

D. C ba hnh u ng. SHAPE \* MERGEFORMAT

2. Trng hp no di y c th coi l gng phng?

A. T giy trng v phng. B. Mt bn g.

C. Ming ng phng c nh bng. D. C A,B, C u ng.

3. Chiu mt tia ti ln gng phng. Bit gc ti a = 600, gc b to bi tia phn x v mt phng gng c ln l:

A.b = 900 - 600 = 300 B. b = a = 600 C. b = 900 + 600 = 1500 D. b = 1800 - 600 = 1200

II. in t thch hp vo ch trng.

Tia sng truyn ti mt gng phng, b ht tr li theo mt hng xc nh. gi l hin tng .. Tia sng truyn ti gng gi l ., tia sng t mt gng ht tr ra gi l ...

Nu gc ti bng 0 th tia phn x v tia ti c phng ..

Cm t cho sn: tia phn x, phn x nh sng, trng nhau, tia ti.

C. Bi tp t lun:

1. Cho cc hnh v a,b,c, di y. Hy v tia phn x (hoc tia ti) v xc nh trn hnh v ln ca cc gc ti i (hoc gc phn x i)

2. Mt ci cy cao 2,4m gn b ao. B ao cao hn mt nc 0,5mm. Hi nh ca ngn cy cch mt nc bao nhiu?3. Hy v nh ca mt s vt t trc gng phng cc trng hp sau

A B A A

C D

B B C Tit 5 Ngy ................

n tp: nh ca mt vt to bi gng phng

A.Kin thc cn nh:

......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim:

I. Khoanh trn vo p n ng.

1. Hai tm gng phng ging ht nhau c t vung gc vi nhauv vung gc vi mt sn, mt phn x quay vo nhau. Mt ngi ng gia hai gng ln lt nhn nh ca mnh trong hai gng. c im ca hai nh nh th no?

A. Hai nh c chiu cao nh nhau.

B. Hai nh ging ht nhau.

C. Hai nh c chiu cao khc nhau.

D. C A v B u ng.

2. im sng S t trc gng phng vi cc khong cch nh hnh v. S l nh ca S qua gng. Hy xc nh khong cch SS

A. SS = 25cm

B. SS = 20cm

C. SS = 50cm

D. SS = 40cm

II. in t thch hp vo ch trng.

t mt vt sng cao 25cm, cch gng 15cm, hp vi mt gng phng mt gc 450 th nh ca vt sng c chiu cao l . , cch vt mt khong l v hp vi vt mt gc l ..

C. Bi tp t lun:

1. Trong cc hnh v di y, hy v cc tia sng xut pht t S n gp gng phng ri phn x qua R

2. Hy v nh ca vt sng AB trong cc trng hp sau:

3. Ti cc ca hiu ht tc, khch c th quan st phn sau gy ca mnh ch ca hiu cn phi t 2 gng phng nh th no? Tit 6 Ngy ................

n tp: bi tp vn dng nh lut truyn thng ca nh sng v

nh lut phn x nh sng

A.Kin thc cn nh:

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B. Bi tp trc nghim: Khoanh trn vo p n ng.

1. Chm tia sng mt tri xem l chm sng song song chiu xin n mt t, hp vi mt t mt gc 450. Mt ci cc cm thng ng trn mt t, phn cc nh ln cao 1m. Bng ci cc trn mt t di:

A. 1m B. 2m C. 1,5m D. 0,5m

2. Tia sng mt tri chiu xin hp vi mt ngang mt gc 360 n gp gng phng cho tia phn x c phng thng ng hng xung di. Gc hp bi mt gng v ng thng ng l:

A. 360 B. 630 C. 720 D. 2703. Cho im sng S cch gng phng 40cm. Cho S dch chuyn li gn gng theo phng vung gc vi gng mt on 10cm. nh S by gi s cch S mt khong:

A. 60cm B. 80cm C. 100cm D. 25cm

4. Cho tia ti hp vi mt gng mt gc 60o. Gc phn x bng:

A- 60oB- 50oC- 40oD- 30oC. Bi tp t lun

1. Mt bng n nh S xem l ngun sng im t cch tng mt khong SH = 1m. Ti trung im M ca SH ngi ta t mt tm ba hnh trn c bn knh 20cm v song song vi tng. Bn knh bng en in trn tng l bao nhiu?

2. Cho 2 gng phng M,N t vung gc nhau, c mt phn x quay vo nhau v hai im A, B nh hnh v. Hy nu cch v tia sng xut pht t A n gng M ti I, phn x n gng N ti K ri phn x n B. Xc nh iu kin bi ton c th v c tia sng trn.

3. Chiu mt tia sng SI ln mt gng phng ta thu c mt tia phn x to vi tia ti mt gc 120o. Hy v hnh v tnh gc phn x ?

Tit 7 Ngy ................

n tp: GNG CU LI

A.Kin thc cn nh:

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B. Bi tp trc nghim: 1. Gng cu li c s dng lm knh chiu hu ( knh nhn sau) gn trn xe t, mt v:

A. D ch to. B. Cho nh to v r.

C. Vng quan st pha sau qua gng rng. D. C 3 l do trn.2. iu no sau y khng ng khi ni v gng cu li:

A. C tm mt cu nm pha sau mt phn x.

B. C tm mt cu nm pha trc mt phn x.

C. Vt sng qua gng lun cho nh o.

D. Chm sng phn k chiu n gng, chm sng phn x t gng cng s phn k.

3. Gng cu li l:

A. Mt cu phn x tt nh sng, mt phn x l mt li.

B. Mt cu phn x tt nh sng, mt phn x l mt lm.

C. Mt cu li trong sut.

D. Mt cu li hp th tt nh sng.

4. Trn hnh v, mt t ti M trc gng cu li: V M' l nh do hai tia phn x IR v KJ gp nhau ti . Hi mt c th quan st c nhng vt nm trong vng no bng cch nhn nh ca vt trong gng?

C.Bi tp t lun

1. Quan st mt vin phn t trc gng cu li

a. Anh ca vin phn l nh tht hay nh o? ln ca nh nh th no so vi ln ca vin phn? Khong cch t nh ca vin phn n gng gn hn hay xa hn khong cch t vin phn n gng?

b. Nu x dch vin phn n gn gng th nh ca n x dch nh th no?

c. Nu x dch vin phn ra xa gng th nh ca n x dch nh th no?

2. Da vo nh lut phn x nh sng em hy v nh ca vt AB qua gng cu li trong trng hp sau. Bit O l tm ca phn mt cu.

Tit 8 Ngy ................

n tp: GNG CU Lm

A.Kin thc cn nh:

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B. Bi tp trc nghim: 1. Gng cu lm thng c ng dng :

A. Lm cha n pha xe t, mt n pin.

B. Tp trung nng lng mt tri.

C. n chiu dng khm bnh tai, mi, hng.

D. C ba ng dng trn.

2. Mt chm tia song song chiu n mt gng, chm phn x s hi t ti mt im v ngc li, mt chm tia phn k thch hp chiu n gng s cho chm tia phn x song song. Gng y l loi gng:

A. Gng phng B. Gng cu lm

C. Gng cu li D. C ba loi gng trn

3. Vt sng qua gng no sau y khng th cho nh tht?

A. Gng phng B. Gng cu lm

C. Gng cu li D. Gng phng v gng cu lm.

4. Ta bit rng khi chiu mt chm tia song song ln mt gng cu lm th chm tia phn x s hi t ti mt im trc gng. Nu t ti im mt mn chn nh th ta s thy:Chn cu tr li ng.

C. Bi tp t lun

1. Quan st mt vin phn t st gng cu lm

a. Anh ca vin phn l nh tht hay nh o? ln ca nh nh th no so vi ln ca vin phn? Khong cch t nh ca vin phn n gng gn hn hay xa hn khong cch t vin phn n gng?

b. Nu x dch vin phn n gn gng th nh ca n x dch nh th no?

c. Nu x dch vin phn ra xa gng th nh ca n x dch nh th no?

2. Trn hnh v, bit O v C ln lt l nh v tm ca gng cu li, S l im sng, CI, CK l cc php tuyn. Hy v nh ca im sng S v nu nhn xt v tnh cht ca nh.

Tit 9 Ngy ................

n tp chng i: quang hc

A.Kin thc cn nh:

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B. Bi tp trc nghim: 1. Cc cu sau y ng hay sai?

A. Gc hp bi tia phn x vi mt gng lun bng vi gc hp bi tia ti v mt gng.

B. Tia sng truyn theo ng thng.

C. Khi tia ti v tia phn x vung gc vi nhau th gc ti bng gc phn x bng 900.

D. Khi vt tin li gn gng thm 30cm th khong cch gia vt v gng tng ln thm 60cm.

2. t mt vt cao 10cm trc 3 gng. Gng th nht (G1) cho nh cao 10cm, Gng th hai (G2) cho nh cao 8cm, Gng th ba (G3) cho nh cao 14cm. Hy gi tn cc gng.

A. G1 l gng phng, G2 l gng cu lm, G3 l gng cu li.

B. G1 l gng phng, G3 l gng cu lm, G2 l gng cu li.

C. G2 l gng phng, G1 l gng cu lm, G3 l gng cu li.

D. G2 l gng phng, G3 l gng cu lm, G1 l gng cu li.

3. So snh gc ti v gc phn x ca ba loi gng.

A. Gng phng: gc ti bng gc phn x.

B. Gng cu lm: gc ti ln hn gc phn x. C. Gng li: gc ti nh hn gc phn x. D. C A, B, C u ng. C. Bi tp t lun1. Trn hnh v, S l im sng, S' l nh. V hai tia ti t S n hai mp gng phng l I v K, v tip hai tia phn x ti l IR v KJ. Mun quan st thy nh o S' trong gng phng th mt phi nm trong vng no trc gng? (vng quan st nh S')

2. V nh ca cc vt sau qua gng phng:

SHAPE \* MERGEFORMAT

3. Mt ngi cao 1,7m ng cch gng phng treo st tng 1 khong 1,2 m. Hi nh ca ngi cao bao nhiu? cch ngi mt khong bao nhiu?

Nu ngi li xa gng thm mt khong 30cm th lc ny nh cch ngi bao nhiu cm?

Tit 10 Ngy ................

n tp cha bi kim tra

A. Bi tp trc nghim: 1. Pht biu no sau y l ng khi ni v s phn x ca nh sng khi gp gng cu li.

A. mt chm tia sng song song khi n gp gng cu li b phn x, chm tia sng phn x cng l chm song song.

B. Mt tia sng khi n gp gng cu li s b phn x nhng khng tun theo nh lut phn x nh sng v nh lut phn x nh sng ch ng cho trng hp gng phng m thi.

C. Mt tia sng khi n gng cu li theo phng vung gc vi mt gng th khng b phn x, v lc ta khng nhn thy tia sng phn x.

D. Cc pht biu A,B,C u sai.

2. Nhng pht biu sau y l ng hay sai khi ni v ng i ca mt tia sng khi n gng cu lm?

A. Cc tia sng khi n gng cu lm u b phn x v tun theo nh lut phn x nh sng.

B. Chm tia sng song song n gng cu lm s cho chm phn x l mt chm sng phn k.

C. Chm tia sng song song n gng cu lm s cho chm phn x l mt chm sng hi t.

D. Khi phn x trn gng cu lm, tia ti v tia phn x khng bao gi trng nhau. 3. Mt gng phng t nghing mt gc 450 so vi phng nm ngang, chiu mt chm tia ti song song theo phng nm ngang ln mt gng. Gng to chm tia phn x:

4.Trn hnh v, l mt thit b dng gng cu lm hng nh sng Mt Tri un nc nng. Thng nc nng ln v:Chn cu gii thch r rng, y nht.

C. Bi tp t lun1. Trc mt gng phng (G) ly 2 im A,B bt k. Gi s A l im sng, hy nu cch v tia sng xut pht t A, phn x ti I trn gng (G) ri i qua B.2. Ti cc ca hiu ct tc, khch c th quan st phn sau gy ca mnh, ch hiu cn phi t hai gng phng nh th no?3. Cho mt vt sng AB t trc gng phng ( nh hnh v )a. V nh AB ca AB to bi gng phng (1,5) B

b.Xc nh v gch cho vng t mt c th A

quan st c ton b nh AB(1,5)

Tit 11 Ngy ................

n tp : Ngun m

A.Kin thc cn nh:

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B. Bi tp trc nghim: 1. Nhng nhc c no sau y pht ra m thanh l nh cc ct khng kh dao ng trong nhc c ?

A. So. B. Kn hi.

C. Khn. D. C 3 nhc c trn.

2. Chn cc t thch hp in vo ch trng.

Khi mt vt ., cc lp khng kh xung quanh vt dao ng theo. Cc dao ng ny truyn n tai lm cho . Dao ng, sau nh cc dy thn kinh truyn tn hiu ln , khin ta cm nhn c m thanh.

3. Pht biu no sau y cha ng?

A. Ngun m l tt c nhng vt pht ra m.

B. Mi vt dao ng u pht ra m thanh m ta c th nghe c.

C. Khi nghe c m thanh t mt vt pht ra, ta bit chc chn rng vt y dao ng.

D. Khi thi vo ming hai ng nghim di nh nhau, ng cng nh th m pht ra cng bng.

4. Khi ta ang nghe i th :

AMng loa ca i b nn

BMng loa ca i b cng ra

CMng loa ca i b bp

DMng loa ca i b dao ng

5. Vt no sau y c gi l ngun m ?

A. Cy sng B. Ci trng C. Ci ci ang thi D. m thoa

6. Bp tay vo con cht cht chi thy c ting ku . m thanh gy bi ngun m no?

A: Bn tay

B: B phn li g ca con cht cht

C: V con cht cht

D: Khng kh bn trong con cht cht

C.Bi tp t lun

1. Em hy quan st mt chic loa v cho bit ti sao loa li pht ra c m thanh?

2. Gy vo dy n ghi-ta ta thy n pht ra m thanh. Bn A cho rng ta nghe c m thanh pht ra t dy n. Cn bn B th khng nh m thanh pht ra t thng n. Bn no ng, gii thch?

3. Ha k tn 5 ngun m thin nhin v 5 ngun m nhn to. Tit 12 Ngy ................

n tp : cao ca m

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim: 1. Mt vt nng buc cht vo dy mnh treo vo mt im c nh c gi l con lc. Mt con lc thc hin c 20 dao ng trong 10 giy. Tn s dao ng ca con lc l:

A. 2Hz B. 2s C. 0,5 Hz D. 0,5s

2. C hai con lc, trong cng mt khong thi gian con lc th nht thc hin c 10 dao ng, con lc th hai thc hin c 15 dao ng. Tn s dao ng ca con lc no ln hn v ln hn bao nhiu ln?

A. Tn s dao ng ca con lc th nht ln hn v ln hn 1,5 ln?

B. Tn s dao ng ca con lc th hai ln hn v ln hn 1,5 ln?

C. Tn s dao ng ca con lc th nht ln hn v ln hn 3 ln?

D. Tn s dao ng ca con lc th hai ln hn v ln hn 3 ln?

3. in t hoc cm t thch hp vo ch trng.

Khi ln lt thi vo ming ca np bt myv v thn bt my th khng kh trong s . v pht ra .. Np bt my pht ra m .. hn m pht ra t thn bt my.4. Chn cu sai :A: Tai ngi c th nghe c m c tn s trong mt khong nht nh

B: n v ca tn s l hc

C: Cc m c cao khc mhau c tn s khc nhau

D: Cn c vo tn s ta cha th so snh dc cao ca m

5. Ngi ta o c tn s dao ng ca mt s dao ng nh sau:

Hy xc nh dao ng no c tn s ln nht ?

A. Vt dao ng c tn s 100Hz B. Trong mt giy vt dao ng c 70 dao ng

C. Vt dao ng c tn s 200Hz D. Trong mt pht vt dao ng1500 dao ngBi tp t lun

1. Mt HS cho rng cc vt dao ng tn s t 20Hz n 20 000Hz mi pht ra c m thanh. Nu vt dao ng c tn s ln hn 20 000 Hz hoc nh hn 20Hz th khng pht ra m thanh. Theo em kin trn c ng khng?

2. Trong 10 giy mt l thp thc hin c 4500 dao ng. Hi dao ng ca l thp c pht ra c m thanh khng? Tai con ngi c cm nhn c m thanh do l thp pht ra khng? Ti sao?

3. Quan st mt cy n ghi-ta. cao ca m do dy n ghi-ta pht ra ph thuc vo nhng yu t no? Khi ln dy n cng tng, cao ca m do n pht ra c thay i nh th no? Gii thch. Tit 13 Ngy ................

n tp : to ca m

A.Kin thc cn nh:

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B. Bi tp trc nghim: 1. Em hy c lng v chn cc gi tr to ca m ( ct bn tri ) cho ph hp vi s liu cho ( ct bn phi).

Ngun m to

1. Trong phng hc bnh thng.

2. Ting ni chuyn trong phng.

3. Xe ti ang chy.

4. ng c phn lc

5. xng ca ang hot ngA 100dB

B 140dB

C 55dB

D 85dB

E 40dB

2. to ca m n lc lm au nhc tai ngi c gi l ngng au vo khong:

A. 100dB B. 120dB C. 130dB D. 230dB

3. Lm cch no c ting trng va cao va to?A: Lm mt chic trng c tang trng to cao

B: Ko cng mt trng

C:G mnh vo mt trng

D: Lm ng thi c ba cch trn

4. Yu t no quyt nh to ca m?

A: Bin dao ng m

B: Tn s v bin dao ng m

C: Bin v thi gian giao ng m

D: Tt c cc yu t trn

5. Cc vt pht m c s liu nh sau m no s trm v to ?

A. 50Hz- 100dB B. 100Hz- 50dB

C. 50Hz- 50dB D. 100Hz- 100dBC.Bi tp t lun

1. GV th dc mun tp trung HS t cc a im khc nhau v mt ch th phi thi ci tht mnh. Hy gii thch vic lm .

2. Khi gy n ta nghe thy m thanh pht ra. Nu ngay lc ta chm tay vo dy n th m tt ngay. Hy gii thch?

3. Hy sp xp to ca m theo th t gim dn.

Ting ng c my bay phn lc ting n rt to ngoi ng ph- ting nhc to ting ni th thm ting st ting ni chuyn bnh thng.

Tit 14 Ngy ................

n tp : mi trng truyn m

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim: 1. Vn tc truyn m trong cc mi trng gim theo th t:

A. Rn, lng v kh B. Rn, kh v lng

C. Kh, rn v lng D. kh, lng v rn

2. Ta bit nc c th tn ti 3 th rn (nc ), lng, kh (hi nc). Trong cc kin sau, kin no l sai?

A. trng thi rn, nc truyn m thanh tt nht.

B. trng thi kh, nc truyn m thanh km nht.

C. c 3 trng thi, nc u c kh nng truyn m nh nhau.

D. Mt phn t nc cng ln th kh nng truyn m cng tt.

3. Ngi ta thng c cu thnh nh tai ch. Ti sao c hin tng ny?

A. V tai ch c vnh to, mng nh nhy i vi c m yu.

B. V ch hay nm p tai xung t nn c th cm nhn m thanh nhanh hn, tt hn.

C. V trn tai ch c nhiu lng, c th cn cc tp m.

D. C 3 l do trn u ng.

4. Vn tc truyn m trong khng kh vo khong:

A: 340m/s

B:20,4km/pht

C: 1224km/gi

D: Tt c cc gi tr trn u ng

5. Hy chn cu sai:

A: Cht rn lun truyn m thanh tt hn cht lng v cht kh.

B: m thanh c th truyn trong cc mi trng cht lng,rn v kh.

C: Chn khng l mi trng khng th truyn m.

D: Hu ht cc cht rn truyn m tt hn cht lng v cht kh

C. Bi tp t lun

1. Hai bn tranh lun vi nhau:

Bn A: Tt c cc vt cht u l mi trng truyn m.

Bn B: Bng vi, cao su khng phi l mi trng truyn m, v vy chng c dng lm vt liu cch m.

Theo em bn no ng?

2. Ting st v tia chp c to ra gn hn cng mt lc, nhng ta thng nhn thy chp trc khi nghe thy ting st. Hy gii thch.

3. Trong mt cn ging, sau khi nhn thy tia chp 5 giy ngi ta mi nge c ting sm. Hi st xy ra cch ni quan st bao xa? Bit rng m truyn trong khng kh vi vn tc 340m/s. Tit 15 Ngy ................

n tp : Phn x m ting vang

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim: 1. Lm th no hn ch ting vang trong phng?

A. Lm tng mp m. B. t nhiu c mm x s.C. C hai cch trn u c. D. C hai cch trn u khng c.2. V sao khi ni trong phng nh c cha nhiu ta khng nghe thy ting vang?

A. V khng c m phn x t tng ti tai ta.

B. V m phn x t tng ti tai ta cng mt lc vi m pht ra.C. V phng c nhiu th kh nng hp th m cao.D. V c 3 nguyn nhn trn. 3. Chn cu ng:

A: Vt hp th m tt th cng phn x m tt

B: m thanh khi phn x lun truyn ti tai ngi nghe

C: Cc vt c b mt cng nhn khng phn x m

D: S phn x m ng vai tr khuch i m , nu m phn x n tai ngi nghe cng mt lc vi m pht ra

4. Yu t no sau y quyt nh iu kin c ting vang?

A: Khong cch t ngun m n vt phn x m

B: to ca mC: C hai yu t trn

D: khng yu t no trong hai yu t trn

5. Chn t thch hp in vo ch trng.

A. . l m phn x nghe c cch m trc tip mt khong thi gian t nht l 1/15s

B. Hin tng .. c th dng xc dnh su ca y bin

C. Nu mi trng phn x m cng rn th hp th m cng D. m gp mt chn u b nhiu hay t.

C. Bi tp t lun

1. Ti sao khi p tai vo tng ta c th nghe c ting ci ni phng bn cnh, cn khi khng p tai vo tng li khng nghe thy c?

2. V sao trong phng ti hoc hang ti c trng hp con di m vo u ngi?

3. Mt ngi ng cch mt vch ni ht tht to. Sau 0,25 giy ngi nghe c ting vang ca chnh mnh vng li. Hi ngi ng cch vch ni bao xa?4. Trng ti theo di cuc thi chy c li ngn 100m, xc nh thi gian chy ca cc vn ng vin th :

- Khi nghe ting sng pht lnh th trng ti (ang ng vch ch) bm ng h tnh gi.

- Hoc khi nhn khi bc ra ming sng pht khu lnh th bm ng h tnh gi.Cch lm no tnh gi chy ca cc vn ng vin chnh xc hn? Tit 16 Ngy ................

n tp : Chng nhim ting n

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim: 1. Chn cu ng.

A. Tt c nhng m thanh c to ra t nhng dao ng c bin cao gy nn s nhim ting n.

B. Tt c nhng m thanh c to ra t nhng dao ng c bin thp gy nn s nhim ting n.

C. Tt c nhng m thanh c to ra t nhng dao ng c tn s cao gy nn s nhim ting n.

D. Tt c nhng m thanh to, ko di, nh hng ti sc khe con ngi gy nn s nhim ting n.

2. Cc bin php c th gim nhim ting n. Khi nh gn ng phi chu nhim ting n?

A: Xy nh bt kn bng tng b tng B: Lp cc ca bng knh hai lp.

C: C hai cch trn ph hp

D: C hai cch trn khng ph hp

3. Hy ch ra cch lm v mc ch sai trong cc cu sau.

A. Dng cy xanh hng m i theo hng khc.

B. Ph d trn tng khng gy ting n.

C. Xy tng chn ngn chn ng truyn m.

D. Lm trn xp hp th m.

4. Trong cc vt sau vt no c th coi l vt liu lm gim nhim ting n?

A: vi d, vi nhung

B: Gch khoan l

C: l cy

D: tt c cc vt liu k trn

5. Mc nhim ting n ph thuc g?

A: to ca m thanh

B: Tn s dao ng

C: Hng truyn ca m thanh

D: Tt c cc yu t trn

6. Bin php no trong cc bin php sau c th gim nhim ting n?

A: gim tn s dao ng ca ngun B: gim bin dao ng ca vt pht mC:C hai cch A,B ng

D: C hai cch A,B sai

C. Bi tp t lun

1. V sao nhng ni c nhiu ting n ngi ta thng hay xy nh xng bng gch ng?

2. Ti sao cc bnh vin tm thn thng c t ni bit lp nh vng ni hoc cch xa ng quc l?

3. thy c vo khong 22 gi hng ngy i pht thanh li nhc nh mi ngi vn nh i khi nghe cu chuyn m khuya. Hy gii thch vic lm ny. Tit 17 Ngy ................

n tp : tng kt chng ii - m hc

A.Kin thc cn nh:

1. Ngun m l g? Nu c im chung ca cc ngun m.

2. Tn s dao ng l g? cao ca m ph thuc nh th no vo tn s dao ng?

3. Bin dao ng l g? to ca m ph thuc nh th no bin dao ng?

4. m c th truyn qua nhng mi trng no? So snh vn tc truyn m trong cc mi trng ?

5. Th no l m phn x, ting vang? Nhng vt nh th no th phn x m tt (hp th m km)?

B. Bi tp trc nghim: 1. nh du x vo ng hoc sai

Ni dungngSai

1Vn tc truyn m t l vi tn s.

2Vn tc truyn m t l vi bin .

3Cy ci l nhng vt hp th m tt.

4Tc hp th m tt.

5My bay c vn tc ln hn vn tc ca m thanh c gi l my bay siu m.

6m La(440 Hz) ca n bu nghe trm hn n tranh.

7Ngng au c th lm ic tai l 30dB

2. V sao khi ni to trong phng nh ta khng nghe thy ting vang?

A: V khng c ting vang

B: V m phn x ti tai cng mt lc vi m pht ra

C: V tng hp th m D: C ba nguyn nhn trn

3. Lm th no hn ch ting vang trong phng ?

A: Lm tng mp m

B: ng trn bng xp

C: C hai cch A,B u c

D C hai cch A,B u khng c

4. nh du X vo tr li thch hp

ngSai

1- to ca m ph thuc vo tn s ca m

2- Nhng m c tn s di 20Hz gi l h tm

3- nh ca mt vt to bi gng cu li c th hng c trn mn chn

4- Khi cc vt dao ng ta lun nghe c m thanh pht ra t cc vt

5- cao ca m ph thuc vo tn s ca m

6- Nhng m thanh c cao xc nh c gi l nhc m

7- Nhng m thanh khng c cao xc nh c gi l tp m

C. Bi tp t lun

1. Ti sao sau mt ting n ln ( ting sm chng hn) ta thng nghe ting rn ko di?

2. gn cc m , thng thng ngi ta thy nh ca rung chuyn sau mi nghe ting n mn. Ti sao vy?

3. Mt ngi ng cch mt vch 680m v la to. Hi ngi y c nghe r ting vang ca m khng? Ti sao? Cho vn tc truyn m trong khng kh l 340m/s.

4. An v Hng tranh lun vi nhau. An ni : Mi cht rn u c kh nng truyn m tt hn cht kh. Hng ni: Cht kh truyn m tt hn cht rn, v mt phn t cht kh t hn nn m khng b hp th. Theo em ai ni ng, ai ni sai? Gii thch? Tit 18 Ngy ................

n tp hc k I

A.Kin thc cn nh:

1. Pht biu nh lut truyn thng nh sng, nh lut phn x nh sng.

2. Nu tnh cht nh ca mt vt to bi gng phng, gng cu li, gng cu lm.

3. Ngun m l g? Nu c im chung ca cc ngun m.

4. Tn s dao ng l g? cao ca m ph thuc nh th no vo tn s dao ng?

5. Bin dao ng l g? to ca m ph thuc nh th no bin dao ng?

6. m c th truyn qua nhng mi trng no? So snh vn tc truyn m trong cc mi trng ?

7. Th no l m phn x, ting vang? Nhng vt nh th no th phn x m tt (hp th m km)?

B. Bi tp trc nghim:

1. Tm cu sai trong cc cu sau:

A- Trong khng kh ng truyn ca nh sng l ng thng

B- ng truyn nh sng truyn t khng kh qua thy tinh l ng thng

C- Chm sng gm nhiu tia sng hp thnh

D- Trong chm sng song song, cc tia sng khng giao nhau

2. Mt ngi ng trc gng phng th thy nh ca mnh trong gng cch mnh 1 khong 12m. Hi ngi cch gng bao nhiu?

A. 12m

B. 24m

C. 6m

D. 18m

3. Mt tia sng chiu ti gng phng v hp vi gng phng mt gc 400. Tnh s o gc phnr x?

A. 600

B. 500

C. 900

D. 4004. Ghp ni dung ghi bn ct A vi ni dung thch hp ghi bn ct B

Ct A

Ct B

1- S dao ng trong mt giy a- Ln hn vt

2- m pht ra cng thp b- Nh hn vt

3- Bin dao ng cng ln c- Ln bng vt

4- Cc vt pht ra m d- Khng hng c trn mn chn

5- nh o to bi gng phnge- u dao ng

6- nh o to bi gng cu lif- Gi l tn s

7- nh o to bi gng cu lmg- Khi tn s dao ng cng nh

8- nh o to bi cc gngh- Gi l siu m

9- m c tn s ln hn 20000Hzi- m pht ra cng to

C. Bi tp t lun

1. Gii thch ti sao cng gn ngun m th m nghe cng to?

2. Mt ngi ng cch mt gng phng 2m.

a) Hi nh ca ngi cao bao nhiu, cch ngi mt khong bao nhiu?

b) Nu ngi tin li gn gng vi vn tc 2m/s th nh ca ngi thay i nh th no?

c) Nu ngi ng hp vi gng mt gc 450 th nh hp vi ngi mt gc bao nhiu?

3. Mt ngi ng cch mt vch ni 30m. Hi nu ngi ht tht to th sau bao lu ngi nghe thy ting vang ca chnh mnh vng li? Tit 19 Ngy ................

n tp : s nhim in do c st

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim: 1. Chn cu ng.

A. Ch c cc vt rn mi b nhim in.

B. Ch c cc cht rn v lng mi b nhim in.

C. Cht kh khng bao gi b nhim in.

D. Tt c mi vt u c kh nng b nhim in.

2. Xe chy mt thi gian di, sau khi xung xe, s vo thnh xe i lc ta th nh b in git. Nguyn nhn:

A. B phn in ca xe b hng.

B. Thnh xe c st vi khng kh nn xe b nhim in.

C. Do mt s vt dng bng in gn ang hot ng.

D. Do ngoi tri ang c cn dng.3. Hien tng nhiem ien do co xat co the xay ra nhiet o nao ?

A: Nhiet o cao

B: Nhiet o thap

C: Bat ky nhiet o nao

D: Nhiet o trung bnh

4. Lc nha b nhiem ien tac dung lc hut vao vat nao trong cac vat sau ?

A: Vun giay

B: Qua cau kim loai

C: Dong nc nho chay t voi

D: Ca ba vat tren

5. Vao mua ong khi chai toc bang lc nha, thng xay ra hien tng nao trong cac hien tng sau:

A: lc nha b nhiem ien

B: Toc b nhiem ien

C: Ca hai cau A,B ung

D: Ca A,B sai6. Cac chat trang thai nao co the b nhiem ien?

A: Trang thai ran

B: Trang thai long C: Trang thai kh D: Ca ba trang thai tren

C. Bi tp t lun

1. Trong cc xng dt ngi ta thng treo nhng tm kim loi b nhim in trn cao. Lm nh vy c tc dng g? Gii thch.

2. Trong cc cn dng thng thy c chp ( l tia la in pht ra nh sng chi la) km theo ting sm vang rn, i khi cn c c st. Trc y c mt s ngi tin rng l do thn sm, thn st to ra. Bng kin thc ca mnh v s nhim in em hy gii thch hin tng ni trn.

3. Em hy gii thch nghch l sau y:

Cng lau chi bn gh th cng bm nhiu bi bn.

Cng chi tc, tc cng dng ng.

4. Ti sao cc xe ch xng du thng c mt on dy xch th xung mt ng?

Tit 20 Ngy ................

n tp : hai loi in tch

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim: 1. Nu vt A ht vt B, B ht vt C, C y vt D th:

A. A v C c in tch tri du. B. B v D c in tch cng du

C. A v D c in tch cng du. D. A v D c in tch tri du

2. Chn t thch hp in vo ch trng trong cc cu sau.

A. Hai vt ging nhau, c c st nh nhau th mang in tch . , nu t gn nhau th chng . Nhau.

B. Mt vt nu nhn thm lctron, nhim .. nu mt bt lctron.

C. Thanh nha v thanh thy tinh khi c c xt v t gn nhau th chng .. do chng mang in tch loi.

D. Hai mnh nilng sau khi c c xt bng ming len t gn nhau th chng .

3. Mot vat trung hoa ve ien sau khi co xat tr thanh vat nhiem ien dng v:

A: nhan them ien tch dng B:Nhan them ien tch am

C: Mat bt ien tch dng D: Mat bt Electon4. Chon cau ung:

A: Neu vat A tch ien dng, vat B tch ien am th Ava B ay nhau

B: Neu vat A tch ien am, vat B tch ien dng th Ava B ay nhau

C: Neu vat A tch ien dng, vat B tch ien am th A va B hut nhau

D: Neu vat A tch ien dng, vat B tch ien dng th A va B hut nhau

C. Bi tp t lun

1. Ly thanh thy tinh c st vi ming la. Ming la tch in m. Sau ta thy thanh thy tinh y vt B, ht vt C v ht vt D.

Thanh thy tinh nhim in g? Cc vt B, C, D nhim in g? ; C v D; B v D xut hin lc ht hay lc y?

2. Ht nhn nguyn t vng c in tch +79e. Hi:

a. Trong nguyn t vng c bao nhiu lctrn bay xung quanh ht nhn? V sao em bit iu ?

b. Nu nguyn t vng nhn thm 2 lctrn na hoc mt i 2 lctrn th in tch ca ht nhn c thay i khng? Ti sao?

3. Dng mt thanh thy tinh nhim in a n gn qu cu kim loi treo trn gi ta thy ban u qu cu b ht v thanh thy tinh, sau khi chm vo thanh thy tinh th n li b y ra. Em hy gii thch iu .

4. Ti sao khi sn, ngi ta thng nhim in tri du cho sn v vt cn sn?

Tit 21 Ngy ................

n tp : dng in ngun in

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim: 1. in t thch hp vo ch trng:

dng c hot ng c ta phi ni dng c hoc thit b in y vi.

bng .. Mch in nh th gi l 2. Ni hai qu cu kim loi A v B bng mt dy dn bng ng. Trng hp no sau y c dng in chy qua dy dn theo chiu t A n B?

A. A nhim in dng, B khng nhim in. B. A nhim in dng, B nhim in m.

C. A nhim in m, B khng nhim in. D. A v B u khng nhim in.

3. Ni hai qu cu A v B bng dy dn ngi ta thy lctron dch chuyn trong dy dn theo chiu t A n B. Kt lun no sau y l ng khi ni v in tch ca hai qu cu A v B?

A. A nhim in dng, B khng nhim in. B. A nhim in dng, B nhim in m.

C. A nhim in m, B nhim in dng. D. A khng nhim in, B nhim in m.

4. Cau phat bieu nao ung ?

A: Moi nguon ien co 2 cc dng B: Moi nguon ien co 2 cc am

C: Cau A,B ung D: Moi nguon ien eu co hai cc:(+,-)

5. Cau phat bieu nao sai?

A: Dong ien trong kim loai la dong cac Electon t do dch chuyen co hng

B: Chat dan ien la chat cho dong ien i qua

C: Chat cach ien la chat khong cho dong ien i qua

D: Quy c: Chieu dong ien la chieu t cc am qua vat dan va cac dung cu ien ti cc dng cua nguon ien6. Hat nao khi dch chuyen co hng tao thanh dong ien ?

A: ien tch dng

B: Nguyen t

C: ien tch am

D: Ca noi dung A,C eu ung

C. Bi tp t lun

1.Trong cc vt nhim in cng c cc in tch chuyn ng, ti sao khng to ra dng in?

2. Nhng dng c sau y, dng c no l ngun in, dng c no l thit b dng in: bng n, qut my,bp in, t lnh, acqui, pin.

3. Nu cc nguyn nhn c th lm cho mt mch in khng c in v cch khc phc 4. Ni hai qu cu A v B u c nhim in dng bng mt dy dn kim loi. C dng in i qua trong dy dn khng? Ti sao?

Tit 22 Ngy ................

n tp : cht dn in - cht cch in.

Dng in trong kim loi

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim: 1. in t thch hp vo ch trng.

Vt . l vt cho dng in i qua. Vt l vt khng cho dng in i qua. Dng in trong kim loi l dng chuyn ng c hng ca cc t do. Bn ngoi ngun in, cc lctron chuyn ng trong dy dn t cc .sang cc .ca ngun in.

2. Trong chic cu ch, b phn no l vt dn in?

A. Dy ch, v s. B. Dy ch, hai l ng.

C. V s, hai l ng. D. Dy ch, v s, hai l ng.

3. Trong cc cht sau y, cht no l cht dn in, cht no l cht cch in?

Bc, dung dch ng sun pht, giy, thp, thy tinh, ng, b tng, than ch ,g

Cht dn inCht cch in

4. Vat nao sau ay c coi la vat dan ien ?

A: Than ch

B: kim loai

C: Nc muoi

D: ca ba vat tren

5. Vat nao sau ay c coi la vat cach ien ?

A: Thuy tinh

B: khong khi kho C :Nha

D: Ca ba vat ke tren

6. Trong cau ch , bo phan nao dan ien ?

A: Day ch, vo s

B: Vo s, hai la ong

C: Day ch, hai la ong

D: Day ch, vo s , hai la ong 7. V sao cac xe ch xang, thng buoc mot day xch sat roi tha cho keo le tren ng?A: Tao tieng keu bao hieu cho ngi i ng C: Ca A,B ungB: e cho cac ien tch chuyen qua xuong at D: Ca A,B sai

C. Bi tp t lun1. Ti sao ngi ta thng lm ct thu li bng st , ng m khng lm bng g?

2. Cc lctron i qua mt dy dn di 12cm trong 10pht. Hy tnh vn tc ca ltron ra m/s.

3. Khng kh c phi l mi trng cch in khng? Ti sao ng gn dy in cao th c th nguy him mc d ta cha chm vo dy?

4. Trong 1mm3 vt dn in c 30 t ltron t do. Hy tm s lctron t do trong :

a. 0,25m3 vt dn in.

b. Mt si dy hnh tr lm bng vt liu y, c ng knh 0,5mm v chiu di 4m.

Tit 23 Ngy ................

n tp : s mch in

A.Kin thc cn nh:

...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim: 1. in t thch hp vo ch trng: S mch in l hnh v m t cch mc cc ca mch in, mi b phn trong s c v bng mt T cc th in mi c th mc mch in ng yu cu. 2. Thit b no nn dng cng tc in?A. Qut in. B. Bng n. C. Bp in D. C 3 thit b trn..

3. Trn hnh v khi cng tc K2 ng th n no sng?

A. Khng n no.

B. n 1.

C. Tt c cc n.

D. n 2.


4. S o mach ien nao ve ung?

5. Cau phat bieu nao ung:

A: Mach ien c mo ta bang s o.

B: T s o mach ien co the lap mach ien tng ng.

C: Ca A va B eu ung.

D: Ca A va B eu sai.

C. Bi tp t lun

1. Mi mch in thng c nhng b phn c bn no? Nu tc dng ca mi b phn.

2. Hy v s mch in gm hai ngun in mc lin tip, 1 kha K, 2 bng n mc ni tip.

3. Cho s mch in nh hnh v. Hi n no sng, n no tt khi ta:

b. Tho n 1

c. Tho n 2

d. Tho n 3

e. Tho n 4


4. C 3 bng n, 3 kha K v 2 ngun in mc lin tip. Hy v 1 s mch in theo cc yu cu sau:

a. Nu kha 1 b ngt c 3 bng u tt.

b. Nu kha 2 b ngt 1 bng tt, 2 bng cn li sng.

c. Nu kha 3 b ngt 1 bng tt, 2 bng cn li sng. Tit 24 Ngy ................

n tp :Tc dng nhit v tc dng pht sng ca dng in

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim: 1. Trong cc trng hp sau, trng hp no tc dng nhit l c ch?

A. Dng in lm nng bu qut. B. Dng in lm nng dy tc bng n

C. Dng in lm nng my iu ha D. C ba vt trn, tc dng nhit u l v ch.

2. n Nn ( n ng) hot ng da trn nguyn l no?

A. Dng in lm dy tc nng ln v pht sng.

B. Dng in lm v bng nng ln v pht sng.

C. Dng in lm cht kh trong n pht sng.

D. C A, B, C u ng.

3. Cu no sau y sai?

A. Dng in chy quady tc bng n lm dy tc nng t khong 25000C v pht sng.

B. Khi nhit tng ti 8000C th mi vt bt u nng chy.

C. Ngi ta thng dng Vnfram lm dy tc bng n.

D. Dng in c th lm n it pht quang.

4. in t thch hp vo ch trng.

a. . c th lm sng bng n khi chy qua bng n. Khi ta ni c tc dng.

b. Di tc dng bp in khi c dng in i qua.

C. Bi tp t lun

1. Khi c dng in chy qua mt bng n in, bng n s pht sng ng thi nng ln. Nh vy hai tc dng ca dng in cng pht huy mt lc. Hi trong hai tc dng trn tc dng no l quan trng hn ? V sao?

2. Bng kp l mt thit b c mt trong nhiu thit b in cn ng ngt mch in t ng. N gm 2 tm kim loa khc nhau dn cht vo nhau. Mt u gn c nh, u kia b tr chm vo tip im A nh hnh v. Khi dng in chy qua bng kp qu mt gii hn no , bng kp s b cong xung tch khi tip im v dng in b ngt. Hi:

a. Vic ch to bng kp da trn tc dng no ca dng in?

b. Hai tm kim loi ca bng kp c th lm cng mt th kim loi c khng? Ti sao?

c. Trong hai tm kim loi cu to nn bng kp, tm no phi dn n v nhit nhiu hn? Ti sao?

Tit 25 Ngy ................

n tp :Tc dng t , tc dng ha hc v tc dng sinh l ca dng in

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim: 1. Hy chn cc t cho trc in vo ng ct tng ng v tc dng ca dng in.

My git, bn l in, Bng n compc, pin, c qui, l si in, ni cm in, chm cu in, tinh luyn kim loi, bng dn LED, qut in, my sy tc.

T/d nhitT/d pht sngT/d tT/d ha hcT/d sinh l

2. Nu dng phng php tinh luyn kim loi da vo tc dng ha hc ca dng in th ta c th thu c kim loi nguyn cht u?

A. Cc m nhng trong dung dch. B. C cc m v cc dng.

B. Cc dng nhng trong dung dch. D. Lng ng di y bnh.

3. Trong cc nhn xt sau, nhn xt no l sai?

A. My git hot ng da trn tc dng t ca dng in.

B. Rle t ngt hot ng da trn tc dng nhit ca dng in.

C. C th da trn tc dng ha hc ca dng in m in.

D. Tc dng sinh l ch c hi i vi c th.

C. Bi tp t lun

1. Mun m vng cho mt chic vng bng ng ngi ta da vo tc dng no ca dng in? Nguyn tc m vng nh th no?

2. Th no l nam chm in, nam chm in c tc dng g?

3. Trn hnh v m t mt cng tc t ng ngt mch in m bo an ton. Hy tm hiu hot ng ca cng tc ny:

a. Khi dng in cha qu mnh th c g xy ra vi NC in, thanh st v tip im?

b. Nu dng in vt qu mc cho php th sao?

c. Sau lm tn mch li c in?

Tit 26 Ngy ................

n tp kim tra

A. Bi tp trc nghim:

I. Tm t thch hp in vo ch trng.

1. Khi ng cng tc, bng n v cng tc u l vt dn in, mch in l mch trong mch . dng in chy qua.

Khi m cng tc, khng kh l mch in l mch .. trong mch . dng in chy qua.

Trong trng hp ng cng tc, cc electron t do dch chuyn t cc sang cc ca ngun in, ngc vi . ca dng in.

2. en iot phat quang (LED) ch cho dong ien i qua (t qua ). Khi o en .

3. Cuon day quan quanh loi sat non co dong ien chay qua la mot . Khi o ta noi dong ien co v no lam cho cuon day quan quanh loi sat co , ngha la co kha nang hut cac vat bang sat, thep hoac lam quay kim nam cham.

II. Khoanh trn vo p n ng1. cc nh my dt, ngi ta thng t nhng tm kim loi ln nhim inA. trang tr cho phng lm vic

B. lm sch khng kh trong phng

C. cc my dt hot ng tt hn v c tm kim loi

D. cho phng lm vic sng hn

2. Qui c chiu dng in l chiu chuyn ng ca in tch no?A. Din tch dng. B. lectron. C. in tch m D. Ht nhn nguyn t..

3. Khi i qua c th ngi dng in c th :

A/ Gy ra cc vt bng. B/ Lm tim ngng p .

C/ Thn kinh b t lit . D/ C A, B, C u ng.

4. Mt vt nhim in dng khi :A. N nhng lectrn cho vt khc . B. N nhn lectrn t vt khc.

C. N phng in qua vt mang in tch dng. D.N y vt mang in tch m .

B. Bi tp t lun

1. V mt mch in gm 1 n, 1 ngun v v 1 vn k o hiu in th gia hai u bng n.

2. Ti sao ngi ta khng dng ng, ch, st lm dy tc bng n ? Gii thch ?

3. Gii thch v sao khi c xt hai vt trung ho in ta li c 2 vt nhim in tri du?

4. Hy nu tn mt dng c dng in m em bit v ch ra cc b phn dn in v cc b phn cch in trn dng c ?

Tit 27 Ngy ................

cng dng in

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim:

1. Ampek no ph hp nht o cng dng in l : 15mA trong 4 ampek c gii hn o sau:

A: 2mA

B: 20mA C: 250mA

D: 2A

2. Vi mt bng n nht nh , dng in chy qua n c cng .......

Th n cng sng:

A: Cng ln

B: Cng nh C: khng thay i

D: bt k

3. Cu pht biu no ng?

A: Dng in cng mnh th cng dng in cng ln

B: o cng dng in bng Ampek

C: n v o cng dng in l Ampe (A )

D: C ba ni dung A,B,C u ng

4.Khi dng Ampek o cng dng in cn ch chn ampek:

A: C kch thc ph hp

B: C gii hn o ph hp

C: C chia nh nht ph hp

D: Kt hp B v C

5. Dng ampek o cng dng in qua mt bng n . Phi mc ampek nh th no?

A: Mc pha trc bng n

B: Mc pha sau bng n

C: Mc ni tip vi bng n

D C ba cch mc trn

C. Bi tp t lun

1. i cc n v sau cho ng:

a. 900mA = ...... A b. 10,23A = ..............mA

c. 0,34A = ........mA d. 2800mA = ............A

e. 190,2mA = .....A g. 0,023A = ..............mA

2. Cho hnh v sau:

- Loi dng c trn thuc

loi g ? v sao?

- Dng c ny dng o

i lng no ca dng in?

- GH v CNN ca dng c ny ?

- Kim ch v tr 1, 2 l bao nhiu ?Tit 28 Ngy ................

Hiu in th

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim:

1. Khi dng vnk o hiu in th gia hai u bng n cn ch chn vnk:

A: C kch thc ph hp

B: C gii hn o ph hp

C: C chia nh nht ph hp

D: Kt hp B v C

2. Dng vnk o hiu in th gia hai u mt bng n . Phi mc vnk nh th no?

A: Mc pha trc bng n

B: Mc pha sau bng n

C: Mc song song vi bng n

D : C ba cch mc

3. Gi tr i no sai?

A: 500kv = 50000v

B: 220v = 0,22kv

C: 0,5 v = 500mv

D: 6kv = 6000v

4. Chn cu ng:

A: Khi hai cc ca ngun in c ni vi vt tiu th in th hiu in th gia hai cc bng khng .

B: Hiu in th gia hai cc ca ngun in h bng khng .

C: Hiu in th cho bit mnh ca dng in.

D: Gia hai cc ca ngun in c hiu in th v hai cc nhim in khc nhau

5. Cn o hiu in th gia hai cc ca ngun in . Phi mc vn k nh th no?

A: Ni tip vi ngun

B: Song song vi ngun

C: Pha trc ngun

D: Pha sau ngun

C. Bi tp t lun

1. i cc n v sau cho ng:

a. 90mV = ...... V

b. 10,23kV = ..............V

c. 0,0034kV = ........mVc. 280V = ............kV

d. 10,2V = .....mV d. 0,03V = ..............mV

2. Cho hnh v sau:

- Loi dng c trn thuc loi g ? v sao?

- Dng c ny dng o i lng

no ca dng in ?

- GH v CNN ca dng c ny ?

- Kim ch v tr 1, 2 l bao nhiu ?

Tit 29 Ngy ................

Hiu in th gia hai u dng c dng in

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim:

1.Trng hp no di y c hiu in th khc khng?

A: Gia hai cc ca mt pin cn mi khi cha mc vo mch

B: Gia hai cc ca mt pin l ngun in trong mch kn

C: Gia hai u bng n ang sng D: C A,B,Cu ng

2. Hiu in th ch c gia hai u bng n khi:

A. C dng in chy qua bng n. C. A hoc B ng.

B. Khng c dng in chy qua bng n. D. Mch in h.

3. Hiu in th gia hai u bng n bng khng th........dng in chy qua bng n.

A: khng c

B: C

C: Ahoc B

4. S vn ghi trn mi dng c in cho bit :.......

A: Hiu in th nh mc

B: Hiu in th ang s dng

C: in nng cn tiu th

D: C A,B,Cng

5. o hiu in th gia hai u vt dn trong hai trng hp. Kt qu thu c l: 3,2V v 3,5V. chia nh nht ca vn k dng l :........

A: 0,2V

B: 0,5V

C: 0,1V

D: 0,25V

6. Khi dng vn k o hiu in th gia hai u vt tiu th in cn phi:

A: Chn vnk c gii hn o ph hp vi gi tr cn o.

B: Phi mc vn k song song vi vt cn o.

C: Mc vnk sao cho dng in i vo cht ( + ) v i ra t cht (-) ca vnk.

D: Kt hp c A,B,C

C. Bi tp t lun

1. V s mch in gm : 2 pin, 1 kho K , 1 n , 1 Am pe k, 1 vn k . Biu din chiu dng in trong mch in trn .

2. Trong s mch in trn , kho K s th no nu :

Hiu in th gia hai u kho K bng khng ?

Hiu in th gia hai u kho K khc khng ?

3. V s mch in gm ngun in ( 2 pin ) ,dy dn, cng tc dng chung cho c hai bng n mc song song, mt Ampe k o cng dng in qua mch chnh v mt Vn k o hiu in th gia hai u on mch song song.

Tit 30 Ngy ................

o cng dng in v Hiu in th i vi on mch ni tip

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim:

1. Trong on mch mc ni tip, dng in c cng ........ti cc v tr khc nhau.

A: Bng nhau

B: Khc nhau

C: C th thay i

2. i vi on mch gm hai n mc ni tip, hiu in th gia hai u on mch ...........cc hiu in th trn mi n.

A: Bng tng

B: Bng hiu C: Gp i

D: Bng na

3. Ba bng n ging ht nhau mc ni tip vi nhau . So snh sng ca ba bng n?

A: Ba n sng nh nhau

B: Mt n snh nht

B: Mt n sng yu nht

C: sng ba n khc nhau

4. Mt ngun in 12V v ba bng n ging ht nhau loi 4V . n sng bnh thng phi mc cc bng nh th no gia hai cc ca ngun?

A: Mc song song ba n

B: Mc ni tip ba n C: Mc hn hp (//,nt)

5. c im no sau y l ca mch in gm hai n 1 , 2 mc ni tip?

A: Hai n ch c mt im ni chung C: C A,B ng

B: Cng dng in qua hai n c gi tr bng nhau D: C A,B sai.

6. Mc ni tip 1 ,2 vo mch in, dng in qua 1 c cng : 0,6A. Hi dng in qua 2 c cng bng bao nhiu?

A: 0,3A

B: 0,6A

C: 1,2A

D: 0,4A

C. Bi tp t lun

1. C hai bng n mc ni tip vo ngun in 9 V, am pe k o hiu in th ca n 1 ch 0,2 A, n 2 c hiu in th l 6V

a. V s mch in ?

b. Tnh cng dng in qua n 2 v ca on mch

c. Tnh hiu in th ca n 1

2. Cho s mch in sau:

S ch am pe k l 0,25A, s ch vn k 4V, ngun in 9 V

a. Tnh cng dng in qua cc n

b. Tnh hiu in th qua n 1Tit 311 Ngy ................

o cng dng in v Hiu in th i vi on mch song song

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim:

1. Trong on mch song song , cng dng in mch chnh ...........cc cng dng in mch r.

A: Bng tng

B: Bng hiu

C: Gp i

D: Bng na

2. Hiu in th gia hai u cc n mc song song l ...........hiu in th gia hai im ni chung.

A: Bng nhau v ln hn

B: Bng nhau v nh hn

C: Bng nhau v bng

D: A hoc B .

3. c im no sau y l ca on mch in gm hai n 1 , 2 mc song song?

A: Hai n c hai im ni chung

B: Hiu in th trn hai n c gi tr bng nhau

C: Nu hai n ging ht nhau th c sng nh nhau

D: C A,B,C ng.

4. Cc bng n in trong gia nh c mc song song khng phi v l do no di y ?

A. V tit kim c s n cn dng

B. V cc bng n c cng hiu in th nh mc

C. V c th bt, tt c n c lp vi nhau

D. V khi mt bng n b hng th cc bng cn li vn sng

C. Bi tp t lun

1. V s mch in gm ngun in ( 2 pin ) ,dy dn, cng tc dng chung cho c hai bng n mc song song, mt Ampe k o cng dng in qua mch chnh v mt Vn k o hiu in th gia hai u on mch song song.

2. Vi mch in trn, khi hai n sng:

a) Nu Ampe k ch 1,5A v bit cng dng in qua n 1 l 0,5A. Tm cng dng in qua

n 2

b) Nu Vn k ch 6V th hiu in th gia hai u mi n l bao nhiu . Ti sao ?

Tit 32 Ngy ................

an ton khi s dng in

A.Kin thc cn nh:

................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

B. Bi tp trc nghim:

1. Lm cch no trnh tc hi ca dng in i vi c th ngi?

A: Khng s dng in

B: Sng cc xa ni sn xut ra in

C: thc hin cc quy tc an ton khi s dng in D: Ch s dng in c cng nh

2. Tc hi ca dng in vi c th ngi l g?

A. Gy tn thng cho tim.

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7 BT VL7 Du CA Nam-HAY.13113