de kiem tra hoc ki 1 ly 11

7/30/2019 de kiem tra hoc ki 1 ly 11

1/11


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A.Cng ca dng in chy qua mt on mch l cng ca lc in trng lm di chuyn cc in tch t do trong on

mch v bng tch ca hiu in th gia hai u on mch vi cng dng in v thi gian dng in chy qua on mch.

B.Cng sut to nhit vt dn khi c dng in chy qua c trng cho tc to nhit ca vt dn v c xc nhbng nhit lng to ra vt n trong mt n v thi gian.

C.Nhit lng to ra trn mt vt dn t l thun vi in tr ca vt, vi cng dng in v vi thi gian dng in chyqua vt.

D.Cng sut ca dng in chy qua on mch bng tch ca hiu in th gia hai u on mch v cng dng inchy qua on mch .Cu 18. Bn cht ca dng in trong cht bn dn l:

A.Dng chuyn di c hng ca cc electron v l trng cng chiu in trng.

B.Dng chuyn di c hng ca cc electron v l trng ngc chiu in trng.C.Dng chuyn di c hng ca cc electron theo chiu in trng v cc l trng ngc chiu in trng.D.Dng chuyn di c hng ca cc l trng theo chiu in trng v cc electron ngc chiu in trng.

Cu 19. Mt ngun in c sut in ng E = 6 (V), in tr trong r = 2 ( ), mch ngoi c in tr R. cng sut tiu th mch ngoi l 4 (W) th in trR phi c gi tr

A.R = 1 ( ). B.R = 6 (v). C.R = 3 ( ). D.R = 2 ( ).

Cu 20. Khi nhit ca dy kim loi tng, in tr ca n s A.Tng ln. B.Khng thay i.C.Ban u tng ln theo nhit nhng sau li gim dn.D.Gim i.

Cu 21. Pht biu no sau y l khng ng?A.Chiu ca dng in c quy c l chiu chuyn dch ca cc in tch dng.B.Chiu ca dng in c quy c l chiu chuyn dch ca cc in tch m.C.Cng dng in l i lng c trng cho tc dng mnh, yu ca dng in v c o bng in lng chuyn qua

tit din thng ca vt dn trong mt n v thi gian.D.Dng in l dng cc in tch dch chuyn c hng.

II. PHN RING : T LUN ( Th sinh ch lm 1 trong 2 phn phn A hoc phn B)A. Dnh cho hc sinh hc cc lp :11B ;11CB ; 11D ;11CCho mch in nh s hnh v. ngun in c sut in ng

E=9V; in tr trong r=1 ; R1=3 ; R2=2 ; R3=4 R4=6 .

a. Tm:in tr tng ng mch ngoi?b. R3 l bnh in phn ng dung dch CuSO4 c cc dngtan. Tm khi lng ng c gii phng in cc sau thigian 16 pht 5 giy.Cho Cu=64, ng ha tr 2

c. Thay bnh in phn R3 bng mt vn k c in tr rt lnTm s ch ca vn k?B. Dnh cho hc sinh hc cc lp 11A

Cho mch in nh s hnh v. ngun in c sut in ngE=6V; in tr trong r=3,2 ; R1=8 ; R2=; R3=4 R4=6

a. Tm:in tr tng ng mch ngoi?b. R4 l bnh in phn ng dung dch CuSO4 c cc dngtan. Tm khi lng ng c gii phng in cc sau thigian 16 pht 5 giy.Cho Cu=64, ng ha tr 2c. Thay bnh in phn R4 bng in tr Rx th UDC=0,6 V. Tm in tr Rx

Ht.

E , r

R1

R2

R3

R4A B

C

E, r

R1

R2

R3

R4

A BD

C


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TRNG THPT NGUYN TRUNG TRC KIM TRA HC K I NM HC 2011-2012

T VT L TIN HC MN : VT L LP 11Thi gian: 45 pht(khng k thi gan pht )

I. PHN CHUNG CHO TT C TH SINH:TRC NGHIM(21 cu t cu 1 n cu 21) Cu 1. Hai im M v N nm trn cng mt ng sc ca mt in trng u c cng E, hiu in th gia M v N l UMN,

khong cch MN = d. Cng thc no sau y l khng ng?A.E = UMN.d B.UMN = E.d C.AMN = q.UMN D.UMN = VM - VN.

Cu 2. Pht biu no sau y l ng?A.Dng in trong cht in phn l dng chuyn dch c hng ca cc electron i v ant v cc in dng i v catt.

B.Dng in trong cht in phn l dng chuyn dch c hng ca cc in m, electron i v ant v in dng i v catt. C.Dng in trong cht in phn l dng chuyn dch c hng ca cc electron i v t catt v ant, khi catt b nungnng.

D.Dng in trong cht in phn l dng chuyn dch c hng ca cc in m i v ant v cc in dng i v catt. Cu 3. Mt ngun in c sut in ng E = 6 (V), in tr trong r = 2 ( ), mch ngoi c in tr R. cng sut tiu th

mch ngoi l 4 (W) th in tr R phi c gi tr

A.R = 1 ( ). B.R = 3 ( ). C.R = 6 (v). D.R = 2 ( ).

Cu 4. Mt in tch t ti im c cng in trng 0,16 (V/m). Lc tc dng ln in tch bng 2.10-4 (N). ln intch l:

A.q = 12,5.10-6 ( C). B.q = 12,5 ( C). C.q = 1,25.10-3 (C). D.q = 8.10-6 ( C).Cu 5. Bn cht dng in trong cht kh l:

A.Dng chuyn di c hng ca cc in dng theo chiu in trng v cc in m ngc chiu in trng.B.Dng chuyn di c hng ca cc electron theo ngc chiu in trng.

C.Dng chuyn di c hng ca cc in dng theo chiu in trng v cc electron ngc chiu in trng.D.Dng chuyn di c hng ca cc in dng theo chiu in trng v cc in m, electron ngc chiu in trng. Cu 6. Mt t in c in dung 500 (pF) c mc vo hiu in th 100 (V). in tch ca t in l:

A.q = 5.104 (nC). B.q = 5.10-2( C) C.q = 5.104 ( C) D.q = 5.10-4 (C).Cu 7. Ngun in vi sut in ng E, in tr trong r, mc vi in tr ngoi R = r, cng dng in trong mch l I. Nu

thay ngun in bng 3 ngun in ging ht n mc ni tip th cng dng in trong mch l:A.I' = 1,5I. B.I' = 2,5I. C.I' = 2I. D.I' = 3I.

Cu 8. Cng ca dng in c n v l:A. W B.kVA C.J/s D. kWh

Cu 9. Cng thc xc nh cng ca lc in trng lm dch chuyn in tch q trong in trng u E l A = qEd, trong d l:A. di i s ca on t hnh chiu im u n hnh chiu im cui ln mt ng sc.B. khong cch gia hnh chiu im u v hnh chiu im cui ln mt ng sc.C. di i s ca on t hnh chiu im u n hnh chiu im cui ln mt ng sc, tnh theo chiu ng sc in.D.khong cch gia im u v im cui.

Cu 10. Hai in tch im bng nhau c t trong nc ( = 81) cch nhau 3 (cm). Lc y gia chng bng 0,2.10-5

(N). Haiin tch A.cng du, ln l 4,472.10-10 ( C). B.tri du, ln l 4,472.10-2 ( C).C.tri du, ln l 4,025.10-9 ( C). D.cng du, ln l 4,025.10-3 ( C).

Cu 11. Pht biu no sau y l khng ng?A.T in l mt h hai vt dn t gn nhau nhng khng tip xc vi nhau. Mi vt gi l mt bn t.B.in dung ca t in l i lng c trng cho kh nng tch in ca t in v c o bng thng s gia in tch

ca t v hiu in th gia hai bn t.C.Hiu in th gii hn l hiu in th ln nht t vo hai bn t in m lp in mi ca t in b nh thng.D.T in phng l t in c hai bn t l hai tm kim loi phng c kch thc ln t i din vi nhau.

Cu 12. Hai in tch q1 = 5.10-9 (C), q2 = - 5.10

-9 (C) t ti hai im cch nhau 10 (cm) trong chn khng. ln cng intrng ti im nm trn ng thng i qua hai in tch v cch u hai in tch l:

A.E = 18000 (V/m). B.E = 1,800 (V/m). C.E = 36000 (V/m). D.E = 0 (V/m).Cu 13. Cho on mch gm in tr R1 = 100 ( ), mc ni tip vi in tr R2 = 200 ( ). t vo hai u on mch mt hiu

in th U khi hiu in th gia hai u in tr R1 l 6 (V). Hiu in th gia hai u on mch l:A.U = 12 (V). B.U = 18 (V). C.U = 6 (V). D.U = 24 (V).Cu 14. Pht biu no sau y l khng ng?

A.Dng in l dng cc in tch dch chuyn c hng.B.Chiu ca dng in c quy c l chiu chuyn dch ca cc in tch dng. C.Cng dng in l i lng c trng cho tc dng mnh, yu ca dng in v c o bng in lng chuyn qua

tit din thng ca vt dn trong mt n v thi gian.D.Chiu ca dng in c quy c l chiu chuyn dch ca cc in tch m.

Cu 15. Bn cht ca dng in trong cht bn dn l:A.Dng chuyn di c hng ca cc l trng theo chiu in trng v cc electron ngc chiu in trng.B.Dng chuyn di c hng ca cc electron v l trng cng chiu in trng.C.Dng chuyn di c hng ca cc electron theo chiu in trng v cc l trng ngc chiu in trng.D.Dng chuyn di c hng ca cc electron v l trng ngc chiu in trng.

Cu 16. Pht biu no sau y l khng ng?

M : 168


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A.Theo thuyt lectron, mt vt nhim in m l vt tha lectron.B.Theo thuyt lectron, mt vt nhim in dng l vt thiu lectron.C.Theo thuyt lectron, mt vt nhim in m l vt nhn thm lectron.D.Theo thuyt lectron, mt vt nhim in dng l vt nhn thm cc ion dng.

Cu 17. Khi nhit ca dy kim loi tng, in tr ca n s A.Khng thay i. B.Ban u tng ln theo nhit nhng sau li gim dn. C.Tng ln. D.Gim i.

Cu 18. Pht biu no sau y l khng ng?A.Nhit lng to ra trn mt vt dn t l thun vi in tr ca vt, vi cng dng in v vi thi gian dng in chy

qua vt.B.Cng ca dng in chy qua mt on mch l cng ca lc in trng lm di chuyn cc in tch t do trong on

mch v bng tch ca hiu in th gia hai u on mch vi cng dng in v thi gian dng in chy qua on mch.C.Cng sut ca dng in chy qua on mch bng tch ca hiu in th gia hai u on mch v cng dng in

chy qua on mch .D.Cng sut to nhit vt dn khi c dng in chy qua c trng cho tc to nhit ca vt dn v c xc nh

bng nhit lng to ra vt n trong mt n v thi gian.Cu 19. Cng thc no sau y l cng thc ng ca nh lut Fara-y?

A.m = D.V B.FIA

nmt

..

. C. tI

n

AFm . D.

At

nFmI

.

..

Cu 20. ln ca lc tng tc gia hai in tch im trong khng khA.t l vi khong cch gia hai in tch.B.t l vi bnh phng khong cch gia hai in tch.C.t l nghch vi bnh phng khong cch gia hai in tch.D.t l nghch vi khong cch gia hai in tch.

Cu 21. Mt mi hn ca mt cp nhit in c h s T = 65 (V/K) c t trong khng kh 200C, cn mi hn kia c nung

nng n nhit 2320C. Sut in ng nhit in ca cp nhit khi lA.E = 13,98mV. B.E = 13,00mV. C.E = 13,58mV. D.E = 13,78mV.



a. Tm:in tr tng ng mch ngoi?b. R3 l bnh in phn ng dung dch CuSO4 c cc dngtan. Tm khi lng ng c gii phng in cc sau thigian 16 pht 5 giy.Cho Cu=64, ng ha tr 2

c. Thay bnh in phn R3 bng mt vn k c in tr rt ln

Tm s ch ca vn k?B. Dnh cho hc sinh hc cc lp 11ACho mch in nh s hnh v. ngun in c sut in ngE=6V; in tr trong r=3,2 ; R1=8 ; R2=; R3=4 R4=6


Ht.

E , r

R1

R2

R3

R4A B

C

E , r

R1

R2

R3

R4

A BD

C


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M : 202I. PHN CHUNG CHO TT C TH SINH:TRC NGHIM(21 cu t cu 1 n cu 21)

Cu 1. Cng ca dng in c n v l:A.kVA B. kWh C. W D.J/s

Cu 2. Mt t in c in dung 500 (pF) c mc vo hiu in th 100 (V). in tch ca t in l:A.q = 5.10-2(C) B.q = 5.104 ( C) C.q = 5.104 (nC). D.q = 5.10-4 (C).

Cu 3. Cho on mch gm in tr R1 = 100 ( ), mc ni tip vi in tr R2 = 200 ( ). t vo hai u on mch mt hiuin th U khi hiu in th gia hai u in tr R1 l 6 (V). Hiu in th gia hai u on mch l:

A.U = 12 (V). B.U = 24 (V). C.U = 6 (V). D.U = 18 (V).Cu 4. Mt in tch t ti im c cng in trng 0,16 (V/m). Lc tc dng ln in tch bng 2.10 -4 (N). ln in

tch l:A.q = 8.10-6 ( C). B.q = 1,25.10-3 (C). C.q = 12,5.10-6 (C). D.q = 12,5 ( C).

Cu 5. Pht biu no sau y l khng ng?A.Theo thuyt lectron, mt vt nhim in m l vt nhn thm lectron.B.Theo thuyt lectron, mt vt nhim in dng l vt nhn thm cc ion dng.C.Theo thuyt lectron, mt vt nhim in dng l vt thiu lectron.D.Theo thuyt lectron, mt vt nhim in m l vt tha lectron.

Cu 6. Hai in tch im bng nhau c t trong nc ( = 81) cch nhau 3 (cm). Lc y gia chng bng 0,2.10-5 (N). Haiin tch

A.tri du, ln l 4,025.10-9 ( C). B.cng du, ln l 4,472.10-10 ( C).C.tri du, ln l 4,472.10-2 ( C). D.cng du, ln l 4,025.10-3 ( C).

Cu 7. Pht biu no sau y l ng?A.Dng in trong cht in phn l dng chuyn dch c hng ca cc in m i v ant v cc in dng i v catt. B.Dng in trong cht in phn l dng chuyn dch c hng ca cc in m, electron i v ant v in dng i v catt. C.Dng in trong cht in phn l dng chuyn dch c hng ca cc electron i v t catt v ant, khi catt b nung

nng.

D.Dng in trong cht in phn l dng chuyn dch c hng ca cc electron i v ant v cc in dng i v catt. Cu 8. Mt ngun in c sut in ng E = 6 (V), in tr trong r = 2 ( ), mch ngoi c in tr R. cng sut tiu th


A.R = 3 ( ). B.R = 2 ( ). C.R = 1 ( ). D.R = 6 (v).

Cu 9. Pht biu no sau y l khng ng?A.in dung ca t in l i lng c trng cho kh nng tch in ca t in v c o bng thng s gia in tch

ca t v hiu in th gia hai bn t.B.Hiu in th gii hn l hiu in th ln nht t vo hai bn t in m lp in mi ca t in b nh thng.C.T in l mt h hai vt dn t gn nhau nhng khng tip xc vi nhau. Mi vt gi l mt bn t.

D.T in phng l t in c hai bn t l hai tm kim loi phng c kch thc ln t i din vi nhau. Cu 10. Pht biu no sau y l khng ng?

A.Cng ca dng in chy qua mt on mch l cng ca lc in trng lm di chuyn cc in tch t do trong onmch v bng tch ca hiu in th gia hai u on mch vi cng dng in v thi gian dng in chy qua on mch.

B.Nhit lng to ra trn mt vt dn t l thun vi in tr ca vt, vi cng dng in v vi thi gian dng in chyqua vt.

C.Cng sut ca dng in chy qua on mch bng tch ca hiu in th gia hai u on mch v cng dng inchy qua on mch .

D.Cng sut to nhit vt dn khi c dng in chy qua c trng cho tc to nhit ca vt dn v c xc nhbng nhit lng to ra vt n trong mt n v thi gian. Cu 11. Cng thc no sau y l cng thc ng ca nh lut Fara-y?

A.

At

nFmI

.

.. B. tI

n

AFm . C.

FIA

nmt

..

. D.m = D.V

Cu 12. Hai in tch q1 = 5.10-9 (C), q2 = - 5.10

-9 (C) t ti hai im cch nhau 10 (cm) trong chn khng. ln cng intrng ti im nm trn ng thng i qua hai in tch v cch u hai in tch l:

A.E = 36000 (V/m). B.E = 18000 (V/m). C.E = 0 (V/m). D.E = 1,800 (V/m).Cu 13. Mt mi hn ca mt cp nhit in c h s T = 65 (V/K) c t trong khng kh 20

0C, cn mi hn kia c nungnng n nhit 2320C. Sut in ng nhit in ca cp nhit khi l

A.E = 13,00mV. B.E = 13,78mV. C.E = 13,58mV. D.E = 13,98mV.Cu 14. Bn cht dng in trong cht kh l:

A.Dng chuyn di c hng ca cc in dng theo chiu in trng v cc electron ngc chiu in trn g.B.Dng chuyn di c hng ca cc in dng theo chiu in trng v cc in m, electron ngc chiu in trng. C.Dng chuyn di c hng ca cc in dng theo chiu in trng v cc in m ngc chiu in trng. D.Dng chuyn di c hng ca cc electron theo ngc chiu in trng.

Cu 15. Khi nhit ca dy kim loi tng, in tr ca n s A.Khng thay i.


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B.Tng ln.C.Ban u tng ln theo nhit nhng sau li gim dn.D.Gim i.

Cu 16. Ngun in vi sut in ng E, in tr trong r, mc vi in tr ngoi R = r, cng dng in trong mch l I. Nuthay ngun in bng 3 ngun in ging ht n mc ni tip th cng dng in trong mch l:

A.I' = 3I. B.I' = 2,5I. C.I' = 2I. D.I' = 1,5I.Cu 17. Hai im M v N nm trn cng mt ng sc ca mt in trng u c cng E, hiu in th gia M v N l

UMN, khong cch MN = d. Cng thc no sau y l khng ng?A.AMN = q.UMN B.UMN = E.d C.UMN = VM - VN. D.E = UMN.d

Cu 18. Pht biu no sau y l khng ng?A.Cng dng in l i lng c trng cho tc dng mnh, yu ca dng in v c o bng in lng chuyn qua

tit din thng ca vt dn trong mt n v thi gian.B.Chiu ca dng in c quy c l chiu chuyn dch ca cc in tch m.C.Dng in l dng cc in tch dch chuyn c hng.D.Chiu ca dng in c quy c l chiu chuyn dch ca cc in tch dng.

Cu 19. Cng thc xc nh cng ca lc in trng lm dch chuyn in tch q trong in trng u E l A = qEd, trong dl:

A.khong cch gia im u v im cui. B. khong cch gia hnh chiu im u v hnh chiu im cui ln mt ng sc.C. di i s ca on t hnh chiu im u n hnh chiu im cui ln mt ng sc.D. di i s ca on t hnh chiu im u n hnh chiu im cui ln mt ng sc, tnh theo chiu ng sc in.

Cu 20. ln ca lc tng tc gia hai in tch im trong khng khA.t l vi bnh phng khong cch gia hai in tch.B.t l nghch vi khong cch gia hai in tch. C.t l nghch vi bnh phng khong cch gia hai in tch.

D.t l vi khong cch gia hai in tch.Cu 21. Bn cht ca dng in trong cht bn dn l:A.Dng chuyn di c hng ca cc electron v l trng cng chiu in trng.B.Dng chuyn di c hng ca cc electron theo chiu in trng v cc l trng ngc chiu in trng.C.Dng chuyn di c hng ca cc electron v l trng ngc chiu in trng.D.Dng chuyn di c hng ca cc l trng theo chiu in trng v cc electron ngc chiu in trng.



a. Tm:in tr tng ng mch ngoi?b. R3 l bnh in phn ng dung dch CuSO4 c cc dngtan. Tm khi lng ng c gii phng in cc sau thi

gian 16 pht 5 giy.Cho Cu=64, ng ha tr 2c. Thay bnh in phn R3 bng mt vn k c in tr rt lnTm s ch ca vn k?B. Dnh cho hc sinh hc cc lp 11A



Ht.

E , r

R1

R2

R3

R4A B

C

E , r

R1

R2

R3

R4

A BD

C


7/11



I. PHN CHUNG CHO TT C TH SINH:TRC NGHIM(21 cu t cu 1 n cu 21) Cu 1. Cng thc no sau y l cng thc ng ca nh lut Fara-y?

A.At

nFmI

.

.. B. tI

n

AFm . C.m = D.V D.

FIA

nmt

..

.

Cu 2. Cng ca dng in c n v l:

A.kVA

B.kWh

C.W

D.J/s

Cu 3. ln ca lc tng tc gia hai in tch im trong khng khA.t l nghch vi khong cch gia hai in tch.B.t l vi bnh phng khong cch gia hai in tch.C.t l nghch vi bnh phng khong cch gia hai in tch.D.t l vi khong cch gia hai in tch.

Cu 4. Bn cht dng in trong cht kh l:A.Dng chuyn di c hng ca cc electron theo ngc chiu in trng.B.Dng chuyn di c hng ca cc in dng theo chiu in trng v cc electron ngc chiu in trng.C.Dng chuyn di c hng ca cc in dng theo chiu in trng v cc in m, electron ngc chiu in trng. D.Dng chuyn di c hng ca cc in dng theo chiu in trng v cc in m ngc chiu in trng.

Cu 5. Ngun in vi sut in ng E, in tr trong r, mc vi in tr ngoi R = r, cng dng in trong mch l I. Nuthay ngun in bng 3 ngun in ging ht n mc ni tip th cng dng in trong mch l:

A.I' = 2I. B.I' = 1,5I. C.I' = 2,5I. D.I' = 3I.Cu 6. Mt ngun in c sut in ng E = 6 (V), in tr trong r = 2 (

), mch ngoi c in tr R. cng sut tiu th


A.R = 1 ( ). B.R = 6 (v). C.R = 3 ( ). D.R = 2 ( ).

Cu 7. Cho on mch gm in tr R1 = 100 ( ), mc ni tip vi in tr R2 = 200 ( ). t vo hai u on mch mt hiuin th U khi hiu in th gia hai u in tr R1 l 6 (V). Hiu in th gia hai u on mch l:

A.U = 18 (V). B.U = 6 (V). C.U = 12 (V). D.U = 24 (V).Cu 8. Mt in tch t ti im c cng in trng 0,16 (V/m). Lc tc dng ln in tch bng 2.10 -4 (N). ln in

tch l:A.q = 8.10-6 ( C). B.q = 12,5 ( C). C.q = 12,5.10-6 (C). D.q = 1,25.10-3 (C).

Cu 9. Mt t in c in dung 500 (pF) c mc vo hiu in th 100 (V). in tch ca t in l:A.q = 5.104 (nC). B.q = 5.10-2( C) C.q = 5.10-4 (C). D.q = 5.104 (C)

Cu 10. Pht biu no sau y l khng ng?A.Theo thuyt lectron, mt vt nhim in dng l vt nhn thm cc ion dng.B.Theo thuyt lectron, mt vt nhim in dng l vt thiu lectron.C.Theo thuyt lectron, mt vt nhim in m l vt nhn thm lectron.D.Theo thuyt lectron, mt vt nhim in m l vt tha lectron.

Cu 11. Mt mi hn ca mt cp nhit in c h s T = 65 (V/K) c t trong khng kh 200C, cn mi hn kia c nung

nng n nhit 2320C. Sut in ng nhit in ca cp nhit khi lA.E = 13,78mV. B.E = 13,00mV. C.E = 13,58mV. D.E = 13,98mV.

Cu 12. Bn cht ca dng in trong cht bn dn l:A.Dng chuyn di c hng ca cc electron theo chiu in trng v cc l trng ngc chiu in trng.B.Dng chuyn di c hng ca cc electron v l trng cng chiu in trng.C.Dng chuyn di c hng ca cc l trng theo chiu in trng v cc electron ngc chiu in trng. D.Dng chuyn di c hng ca cc electron v l trng ngc chiu in trng.

Cu 13. Cng thc xc nh cng ca lc in trng lm dch chuyn in tch q trong in trng u E l A = qEd, trong dl:

A. khong cch gia hnh chiu im u v hnh chiu im cui ln mt ng sc.B. di i s ca on t hnh chiu im u n hnh chiu im cui ln mt ng sc.C.khong cch gia im u v im cui. D. di i s ca on t hnh chiu im u n hnh chiu im cui ln mt ng sc, tnh theo chiu ng sc in.

Cu 14. Pht biu no sau y l khng ng?A.Cng dng in l i lng c trng cho tc dng mnh, yu ca dng in v c o bng in lng chuyn qua

tit din thng ca vt dn trong mt n v thi gian.B.Chiu ca dng in c quy c l chiu chuyn dch ca cc in tch m.C.Chiu ca dng in c quy c l chiu chuyn dch ca cc in tch dng.D.Dng in l dng cc in tch dch chuyn c hng.

Cu 15. Khi nhit ca dy kim loi tng, in tr ca n s A.Khng thay i. B.Gim i. C.Tng ln.D.Ban u tng ln theo nhit nhng sau li gim dn.

Cu 16. Hai im M v N nm trn cng mt ng sc ca mt in trng u c cng E, hiu in th gia M v N lUMN, khong cch MN = d. Cng thc no sau y l khng ng?

A.AMN = q.UMN B.E = UMN.d C.UMN = E.d D.UMN = VM - VN.

M : 236


8/11

Cu 17. Pht biu no sau y l khng ng?

A.in dung ca t in l i lng c trng cho kh nng tch in ca t in v c o bng thng s gia in tchca t v hiu in th gia hai bn t.

B.T in l mt h hai vt dn t gn nhau nhng khng tip xc vi nhau. Mi vt gi l mt bn t.C.Hiu in th gii hn l hiu in th ln nht t vo hai bn t in m lp in mi ca t in b nh thng.D.T in phng l t in c hai bn t l hai tm kim loi phng c kch thc ln t i din vi nhau.

Cu 18. Hai in tch q1 = 5.10-9 (C), q2 = - 5.10

-9 (C) t ti hai im cch nhau 10 (cm) trong chn khng. ln cng intrng ti im nm trn ng thng i qua hai in tch v cch u hai in tch l :

A.E = 18000 (V/m). B.E = 36000 (V/m). C.E = 0 (V/m). D.E = 1,800 (V/m).Cu 19. Hai in tch im bng nhau c t trong nc ( = 81) cch nhau 3 (cm). Lc y gia chng bng 0,2.10-5 (N). Hai

in tch

A.tri du, ln l 4,472.10-2

( C). B.cng du, ln l 4,025.10-3

(C).C.cng du, ln l 4,472.10-10 ( C). D.tri du, ln l 4,025.10-9 ( C).

Cu 20. Pht biu no sau y l ng?A.Dng in trong cht in phn l dng chuyn dch c hng ca cc in m i v ant v cc in dng i v catt. B.Dng in trong cht in phn l dng chuyn dch c hng ca cc electron i v ant v cc in dng i v catt. C.Dng in trong cht in phn l dng chuyn dch c hng ca cc electron i v t catt v ant, khi catt b nung

nng.

D.Dng in trong cht in phn l dng chuyn dch c hng ca cc in m, electron i v ant v in dng i v catt.Cu 21. Pht biu no sau y l khng ng?

A.Cng ca dng in chy qua mt on mch l cng ca lc in trng lm di chuyn cc in tch t do trong onmch v bng tch ca hiu in th gia hai u on mch vi cng dng in v thi gian dng in chy qua on mch.

B.Cng sut ca dng in chy qua on mch bng tch ca hiu in th gia hai u on mch v cng dng inchy qua on mch .

C.Nhit lng to ra trn mt vt dn t l thun vi in tr ca vt, vi cng dng in v vi thi gian dng in chyqua vt.

D.Cng sut to nhit vt dn khi c dng in chy qua c trng cho tc to nhit ca vt dn v c xc nhbng nhit lng to ra vt n trong mt n v thi gian. II. PHN RING : T LUN ( Th sinh ch lm 1 trong 2 phn phn A hoc phn B)

A. Dnh cho hc sinh hc cc lp :11B ;11CB ; 11D ;11CCho mch in nh s hnh v. ngun in c sut in ng


a. Tm:in tr tng ng mch ngoi?b. R3 l bnh in phn ng dung dch CuSO4 c cc dngtan. Tm khi lng ng c gii phng in cc sau thigian 16 pht 5 giy.Cho Cu=64, ng ha tr 2c. Thay bnh in phn R3 bng mt vn k c in tr rt lnTm s ch ca vn k?B. Dnh cho hc sinh hc cc lp 11A



Ht.

E , r

R1

R2

R3

R4A B

C

E , r

R1

R2

R3

R4

A BD

C


9/11

p n

p n m : 134

01. - - - ~ 07. - - = - 13. ; - - - 19. ; - - -

02. - / - - 08. - / - - 14. - / - - 20. ; - - -

03. - - = - 09. - - = - 15. - - = - 21. - / - -

04. - / - - 10. ; - - - 16. - - = -

05. - - = - 11. - - = - 17. - - = -

06. ; - - - 12. - - - ~ 18. - - - ~

p n m : 168

01. ; - - - 07. ; - - - 13. - / - - 19. - - - ~

02. - - - ~ 08. - - - ~ 14. - - - ~ 20. - - = -

03. ; - - - 09. - - = - 15. ; - - - 21. - - - ~

04. - - = - 10. - - - ~ 16. - - - ~

05. - - - ~ 11. - - = - 17. - - = -

06. - / - - 12. - - = - 18. ; - - -

p n m : 202

01. - / - - 07. ; - - - 13. - / - - 19. - - - ~


10/11

02. ; - - - 08. - - = - 14. - / - - 20. - - = -

03. - - - ~ 09. - / - - 15. - / - - 21. - - - ~

04. - / - - 10. - / - - 16. - - - ~

05. - / - - 11. ; - - - 17. - - - ~

06. - - - ~ 12. ; - - - 18. - / - -

p n m : 236

01. ; - - - 07. ; - - - 13. - - - ~ 19. - / - -

02. - / - - 08. - - - ~ 14. - / - - 20. ; - - -

03. - - = - 09. - / - - 15. - - = - 21. - - = -

04. - - = - 10. ; - - - 16. - / - -

05. - / - - 11. ; - - - 17. - - = -

06. ; - - - 12. - - = - 18. - / - -

HNG DN CHM PHN T LUNA. Dnh cho cc lp 11B,11C;11D; 11CB

Cu a.

Tnh ng R23=R2+R3=6 0.25 im


11/11

-R123=

1 23

1 23

.R R

R R=2

0,25 im

-RN=R123+R4=8 0,5 im

Cu b:

-Tnh ng I=1A 0,25 im

- I=I123=I4=1A

U123=I123R123=2V 0.25 im

-U123=U1=U23=2V

I23=I2=I3=1/3(A) 0,25 im

m=3AI t

Fn=8/75g=0,11g

0,25 im

Cu c:

RN=R14=9 0,25 imI=0.9A=I1=I4 0,25 imUV=U1=I1R1=2,7V 0,5 im

A. Dnh cho cc lp 11A

Cu a. Tnh R13= R1+R3=12 0,25 imR24=R2+R4=10 0,25 imRN=60/11=5,5 0,5 imCu b: I=0,69A 0,25 imN=IRN=3,795 V =U13=U24 0,25 i mI24=0,3795A =I4 0,25 im

m= 4AI t

Fn=0,12g

0,25 im

Cu c:R2x=4+Rx

RN=12(4 )

16

x

x

R

R

0,25 im

I=6(16 )

12(4 ) 3, 2(16 )

x

N x x

RE

R r R R

0,25 im

UN=U2x=U13=6(16 ) 12(4 )

.12(4 ) 3, 2(16 ) 16

x x

x x x

R R

R R R

UN=72(4 )

12(4 ) 3, 2(16 )

x

x x

R

R R

I13=I1=I3=6(4 )

12(4 ) 3,2(16 )

x

x x

R

R R

I2x=I2=Ix=

72

12(4 ) 3,2(16 )x x

R R

UDC=Ux-U3=0.6V

72

12(4 ) 3,2(16 )

x

x x

R

R R -

24(4 )

12(4 ) 3,2(16 )

x

x x

R

R R

=0,6

0,25 im

120Rx-40(4+Rx)=15,2Rx+99,264,8Rx=259,2Rx=4 0,25 im

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