Upload
tranquang
View
8
Download
0
Embed Size (px)
DESCRIPTION
dddddddddddddddd
Citation preview
thi hc k 1 mn L lp 12 THPT Nguyn Du nm 2014
thi hc k 1 mn L lp 12 THPT Nguyn Du nm 2014A.PHN CHUNG CHO TT C HC SINH (32 cu, t cu 1 n cu 32)Cu 1:Pht biu no sau y lng?A.Trong dao ng tt dn, mt phn c nng bin thnh quang nng.
B.Trong dao ng tt dn, mt phn c nng bin thnh in nng.
C.Trong dao ng tt dn, mt phn c nng bin thnh ha nng.
D.Trong dao ng tt dn, mt phn c nng bin thnh nhit nng.
Cu 2:Pht biu no sau y l ng vi mch in xoay chiu ch cha t in?
A.Dng in sm pha hn in p mt gc
B.Dng in tr pha hn in p mt gc
C.Dng in tr pha hn in p mt gc
D.Dng in sm pha hn in p mt gc
Cu 3:Ti mt ni trn mt t , con lc n th c chiu di l1dao ng iu ha vi chu k T1= 0,8 s, con lc c chiu di l1+ l2dao ng iu ha vi chu k T = 1s.chu k ca con lc c chiu di l2l
A.1,8s.B.0,2s.C.0,4s.D.0,6s
Cu 4:Nguyn tc hot ng ca my pht in xoay chiu ba pha da trn
A.tc dng ca dng in trong t trng.B.hin tng t cm.
C.tc dng ca t trng quay.D.hin tng cm ng in t.
Cu 5:Chn cu tr ling. Cng m ti mt m trong mi trng truyn m l 10-5W/m2. Bit cng m chun l I0= 10-12W/m2. Mc cng m ti im bng
A.70 dB.B.80 dB.C.60 dB.D.50 dB.
Cu 6:Sng (c hc) ngang
A.Khng truyn c trong cht rn.
B.Ch truyn c trong cht rn v trn mt cht lng.
C.Truyn c trong cht rn, cht lng v cht kh.
D.Truyn c trong cht rn va trong cht lng.
Cu 7:Khi tn s dng in xoay chiu chy qua on mch ch cha cun cm tng ln 4 ln th cm khng ca cun cm
A.tng ln 2 ln.B.gim i 4 ln.C.tng ln 4 ln.D.gim i 2 ln.
Cu 8:Mt con lc l xo c cng k = 20 N/m dao ng iu ha vi bin 4 cm .ng nng ca vt li 3 cm l
A.0.007J.B.0.07JC.0,0014J.D.0,1J.
Cu 9:Mch in ni tip gm R = 100 W, cun thun cm L v t in c in dung C thay i. Mc mch in vo ngun 220 V 50Hz. iu chnh C cng hiu dng c gi tr cc i. Cng sut ca mch l
A.440 W.B.242 W.C.220 W.D.484 W.
Cu 10:Mt vt dao ng iu ho vi chu k T = 1,2s v vn tc cc i khi vt qua v tr cn bng l 4cm/s. Bin dao ng ca vt l
A.2,4cm.B.3,3cm.C.6cm.D.5,5cm.
Cu 11:Sng truyn trn mt nc c bc sng 2 m . Qung ng sng truyn i c trong mt chu k l
A.2mB.4mC.0,5 mD.1 m
Cu 12:Con lc l xo gm vt c khi lng m v l xo c cng k, dao ng iu ha vi chu k:
Cu 13:Xt sng dng trn si dy, hai im bng lin tip s dao ng
A.ng pha nhau.B.vung pha nhau.C.lch pha nhau .D.ngc pha nhau.
Cu 14:Chn cung. Mt sng c hc c tn s f lan truyn trong mi trng vt cht n hi vi vn tc v, khi bc sng c tnh theo cng thc
A.l = 2v.f.B.l = v.f .C.l = v/f.D.l = 2v/f.
Cu 15:Chn cu tr ling. cao ca m l mt c tnh sinh l ca m ph thuc vo
A.tn s ca m B.cng ca m C.vn tc truyn m D.bin ca m
Cu 16:Mt c tnh vt l ca m l
A. to.B.Cng m.C.m sc.D. cao.
Cu 18:Mt on mch X ch cha mt trong ba phn t : hoc R hoc L hoc C. Bit biu thc in p hai u mch v cng dng in qua mch l u = 100cos (100pt + )(V), i = 2,5cos (100pt + )(A). Phn t X l g v c gi tr l bao nhiu ?
A.C = F.B.R = 40 W.C.L = HD.L = H.
Cu 19:Mt cht im dao ng iu ha dc theo trc Ox vi phng trnh x = 2cos10t (cm).Li ca vt khi ng nng bng th nng l
A.2cm.B.1cm.C.2cm .D.0,707cm .
Cu 20:in p tc thi gia hai u on mch xoay chiu l . Tn s dng in l
A.120 Hz.B.120p Hz.C.100 Hz.D.60 Hz.
Cu 21:Pht biu no sau ykhng ng?
A.iu kin xy ra cng hng l chu k ca lc cng bc bng chu k ca dao ng ring
B.iu kin xy ra cng hng l bin ca lc cng bc bng bin ca dao ng ring
C.iu kin xy ra cng hng l tn s gc ca lc cng bc bng tn s gc ca dao ng ring
D.iu kin xy ra cng hng l tn s ca lc cng bc bng tn s ca dao ng ring
Cu 23:i vi on mch xoay chiu ch c in tr thun,
A.cng dng in hiu dng ph thuc vo tn s ca in p.
B.pha ca dng in tc thi lun lun bng khng.
C.cng dng in v in p tc thi bin thin ng pha.
D.h s cng sut ca dng in bng khng.
Cu 25:Con lc n c chu k bng 1,5s khi n dao ng ni c gia tc trng trng g = 9,80 m /s2. Chiu di ca l xo l
A.l = 45 cm.B.l = 56 cm.C.l = 0,52 m.D.l = 0,65m.
Cu 27:Quan st sng dng trn dy AB di l = 2,4 m ta thy c 7 im ng yn, k c hai im hai u A v B. Bit tn s sng l 25 Hz. Vn tc truyn sng trn dy l
A.10 m/s.B. 17,1 m/s.C.20 m/s.D. 8,6 m/s.
Cu 29:My bin p c s vng ca cun s cp l 250 vng, cun th cp 5000 vng, cng hiu dng qua cun s cp l 4 Hi cng hiu dng trong cun th cp l bao nhiu?
A.8 A.B.0,8 A.C.0,2 A.D. A. 0,02 A.
Cu 30:Chu k dao ng nh ca con lc n ph thuc
A.bin dao ng cu con lc.B.chiu di ca con lc.
C.cch kch thch con lc dao ng.D.khi lng ca con lc.
Cu 31:in p hai u on mch R, L, C mc ni tip l u = 200cos (100pt - ) (V) v cng dng in qua on mch l i = cos 100pt (A). Cng sut tiu th ca on mch bng
A.200 W.B.100 W.C.143 W.D.141 W.
Cu 32:Trn mt cht lng c 2 ngun sng kt hp dao ng cng pha theo phng thng ng ti 2 im A v B cch nhau 7,8 cm . Bit bc sng l 1,2 cm . S im c bin dao ng cc i nm trn on AB l
A.11B.14.C.13.D.12 .
B.PHN RING-PHN T CHN (8 cu ). Hc sinh ch c lm mt trong 2 phn I hoc III.Theo chng trnh c bn (8 cu, t cu 33 n cu 40)Cu 33:Chn cung. Sng dng xy trn dy n hi 2 u c nh khi
A.bc sng bng mt s l chiu di ca dy .
B.bc sng gp i chiu di ca dy .
C.chiu di ca dy bng bi s nguyn na bc sng .
D.chiu di ca dy bng mt phn t bc sng .
Cu 34:Dng in xoay chiu l dng in
A.c cng bin thin tun hon vi thi gian theo quy lut ca hm sin hay csin.
B.to ra t trng bin thin tun hon.
C.c tr s bin thin tun hon theo thi gian.
D.c chiu thay i lin tc.
Cu 35:Mt l xo c chiu di ban u =25cm , khi treo vt m vo th l xo c chiu di 29 cm.Ly g = 10 m/s2v . Kch thch cho vt dao ng iu ho th vt c chu k l
A.4s.B.0,4s .C.10s.D.0,1s.
Cu 36:Mt khung dy dn phng, hnh ch nht gm 200 vng dy quay trong t trng u c cm ng t B = 0,2 T vi tc gc khng i 40 rad/s, din tch ca khung dy S = 400cm2, trc quay ca khung vung gc vi ng sc t. Gi tr cc i ca sut in ng trong khung dy bng
A.201V.B.402 V.C.32V.D.64 V.
Cu 37:Vn tc trong dao ng iu ha
A.bin i theo hm cosin theo thi gian vi chu k .
B.t gi tr cc i khi i qua v tr cn bng.
C.lun lun khng i.
D.lun lun hng v v tr cn bng v t l vi li .
Cu 38:Khi cng m tng gp 10 ln th mc cng m l 10dB. Khi cng m tng gp 100 ln th mc cng m l:
A.20dB.B.100dB.C.50dB.D.30dB.
Cu 39:on mch gm t C = F ni tip vi cun thun cm L = H, dng in tc thi qua mch c dng i = 0,5 cos 100 pt (A). Biu thc in p tc thi hai u mch in l
A.u = 15 cos (100pt + ) (V).B.u = 15 cos (100pt - ) (V).
C.u = 15 cos (100pt +) (V).D.u = 15 cos (100pt - ) (V).
Cu 40:Trong cc phng n truyn ti in nng i xa bng dng in xoay chiu sau y, phng n no ti u ?
A.Dng ng dy ti in c tit din ln.B.Dng dng in khi truyn i c gi tr ln.
C.Dng in p khi truyn i c gi tr ln.D.Dng ng dy ti in c in tr nh.
II.Theo chng trnh nng cao ( 8 cu, t cu 41 n cu 48)Cu 41:Mt mch dao ng LC c tn s dao ng ring l f1= 90kHz nu dng t in C1v c tn s f2= 120kHz nu dng t in C2. Khi dng t in c in dung C = C1+ C2th tn s dao ng ring ca mchl
A.210kHzB.105kHzC.72kHzD.3kHz
Cu 43:Chu k dao ng in t t do trong mch dao ng LC c xc nh bi h thc no sau y?
Cu 44:Mt mch dao ng gm mt cun cm c t cm L = 1mH v mt t in c in dung . Tn s ring ca mch c gi tr no sau y?
A.1,6.103HzB.1,6.104HzC.3,2.103HzD.3,2.104Hz
Cu 45:Chon cung. Sau 2s t lc khi ng, tc gc ca bnh ca mt ng c c gi tr no sau y? Bit rng trong thi gian trn bnh thc hin c mt gc quay l 50 rad. Coi rng bnh quay nhanh dn u
A.100 rad/sB.35 rad/sC.rad/sD.50 rad/s
Cu 46:Tm pht biusaiv in t trng.
A.ng sc ca in trng xoy l cc ng cong kn bao quanh cc ng sc t ca t trng bin thin
B.in trng v t trng khng i theo thi gian cng c cc ng sc l nhng ng cong khp kn
C.Mt t trng bin thin theo thi gian sinh ra mt in trng xoy cc im ln cn
D.Mt in trng bin thin theo thi gian sinh ra mt t trng cc im ln cn
Cu 47:Chn cung.i lng trong chuyn ng quay ca vt rn tng t nh khi lng trong chuyn ng ca cht im l
A.momen lcB.tc gcC.momen qun tnhD.momen ng lng
Cu 48:Mt momen lc 120 Nm tc dng vo bnh xe, lm cho bnh xe quay nhanh dn u t trng thi ngh vi gia tc gc l 8 rad/s2. Momen qun tnh ca bnh xe c gi tr no sau y?
A.15 kgm2B.0,667 kgm2C.1,5 kgm2D.7,5 kgm2
---HT---
p n thi hc k 1 mn L lp 12 THPT Nguyn Du nm 2014