die;tich am.[r]
(1)Trudng THPT chuy1n KHTN, Egi hpc KHTN, DHQG Hd N|i Trangl/4
Bq crAo DUc vA oAo r4o nd rsr rHI] DAI HQC IAN v NAM 20tt - 20Lz
CAu 1: O bd mat mQt ch6t l6ng c6 hai nguiin ph6t s6ng kiit hqp Sr vd Sz c6ch 25 cm Hai nguii'n niy dao dQng theo phuong thing chmg c6 phuong trinh lan lugt ld ur :4cos40nt (mm) vd uz:4cos(4Od + n) (mm) T6c dQ truyAn
tongiren tn"at .tr6itong la a0 crdFko diem dadrt0ng vdi bi6n d0 cuc d4i tr6n clo4n thing SrS2 la
A 10 B ll c.12 D 13
Ciu 2: Neu6n dm rli6m S phrit sting dm truy€n mdi trudng ding huong C6 hai tli6m A vd'B nim tr0n nria rtudng thiig xudt ph6t tir S 86 qua sU h6p thU dm Mrirc culng ttQ 6m t4i A ld LA : 40 dB, tai B la LB: 60 dB
Mtc cudng clQ dm tai trung di€m C cira AB ld
A.42,2 dB B 45,2 dB c.46,5 dB D 50d8
CAu i: Ngu6n dm S ph6t l? u-
"g c6ng su6t P:4n.10" W kh6ng tt6i, truyAn ding huong vA mqi
phucrng Cho
culng dQ dm chuAn Io = l0-r2 Wm2 Di€m M c6ch nguiin S mQgrtoan lm c6 mric culng ttO 6m li
A 50 dB B 60 dB cl70 dB D' 80 dB
Ciu 4: O mflt thoang cria mQt ch6t l6ng c6 hai ngu6n s6ng ktithqp A vd B crich 20cm, dao clQng theo phuong
thing drmg vdi phuong trinh ua :2cos40nt (mm) vd uB = 2cos(40nt + n) (m,m) Bii5t t6c d0 truytin s6ng tr6n m{t
ch6t lOng ld 30 cm/s Xdt hinh vudng AMNB thuQc m{t tho6ng chdt l6ng SO di€m dao <lQng vdi bi€n tlQ cpc clai
tr€n do4n BM la
''' TRt-PcyNG THPT GHUYEN KHTN
-9, -Uc: Uc-* H0 thilc <lting ld :
A frf, = fr2 B f2f3 = fi2
ruON THI : vAr lY Thdi gian ldm bdi:90 phftt
C f3fi = f22
Ma d6:772
D.21.
D.20
D f, + f, =2f,
CAu 5: T4i ditim S tr6n m{t nudc y6h tinh .c6 nguiin dao clQng di6u hoi theo phuong thing clung vdi tdn sii t ffri d6 tr6n mft nudc hinh hQ s6ng trdn ddng 1am S T4i hai ctii3m M, N nim cdch 5cmirdn,duong thdng di qua S lu6n {ao dQng ngugc pha vdiihau Bitit t6c tlQ.truy€n s6ng tr€n mdt nudc ld 80cm/s vd tAn s6 cria ngu6n dao dgng thay tloi trong-khiang itr 48Hz d6n 64Hz.T6ns5 dao itdngpfu ngudn Ii
A 48H2 B.54Hz C-,56H2 D.64Hz.
CAu 6: Hai ngudn s6ng tr0n mat nudc Ie Sr, 52 c6ch S1S, = 91, phi{t hai sSng c6 phuong trinh u, = asinolt vd
A 18 ' B 19 c.24.
u, = acosor S6ng khdng suy giim Sd didm giao ddng vdi bi€n dQ cilc dai trdn doan S,S, lh
A.17 B l8 c 19
Cf,u 7: Cho m4ch diQn xoay chiOu RLC n5i tiiip (L thudn
"?ry):9 tan sO f tnay OOI tlu-oc Khi f : f1 hay f : f2 thi
mach c6 c'ing c6ng suAt, khi f : f3 thi mgch c6 cdng su6t cqc cl4i HQ thric dfng ld :
A, frf, = f; B f2f3 = fi2 c \fr=f:. D fr+f, =2f
Ciu 8: Cho mach ctiQn xoay chi6u RLC nOi ti6p @ thuin cim) c6 tan sii f thay AOi dugc Khi f : fi thi hieu di€n th6 tr6n ctiQn trd Up : UR-*, Uri f : f2 thi hieu dipn th6 tr€n cugn cd'rn U1 : IJL**, f : f: thi hiQu dien th6 tr€n t1r cliQn
Cflu 9: M4ch xoay chi6u nOi ti€p g6m cuQn dAy thu6n cim L, diQn trd R : 150.6 Q vd tg dign C Dat vio hai dAu
do4n m4ch hipu diqn th6 u =IJ
"cos2nft(V) vdi f thay d6i duo c Khi f = fi
: 25 Hzltay f : fz: 100 Hz thi cudng dQ
ddng diQn m4ch c5 giri tr! hiQu dgng nhu nhung lQch pha n /3 Cam khang cuQn ddy khi f : fr ln:
^p.- 50 Q B 100 O C 150 O D.200 O
eAu 10: Con lic ld xo c6 ttrOi tugng 250 g, d0 cung k: 100 N/m Con lic dao tlQng iti€u hoi vdi bi€n d0 A vd
khi crich vi tri cdn beng cm n6 c6 vfln tiic ld 40.\6 cds Gi6 tri cria bi6n tlQ ld
A.2 cm B.3 cm C.4 cm D.5 cm
Ciu 11: Con l6c ld xo dao -lQng didu hoh tr€n doan AB = 10 cm vdi chu ki T = 1,5s Thdi gian ngdn nhdt dd l6c di hdt qudng duhng 95 cm li
A.6s B.7s C.8s D 9s
CSu 12: Con lic ld xo dao dqng di€u hda theo phuong theng dung vdi tAn sii f : 2,5 Hz, qu6 trinh dao ttQng thi t! sti gita lqc ddn h6i cgc d4i vi cr,rc ti6u li 3 Cho n2 = 10 Gi6 fi5c cg9 d4i cta dao dQng ld
a, i,s ,rjr' B m/s2 c I m/s2 D m/s2
Cflu 13: Con l6c ld xo c6 khdi luong m = 100 g, dao dQng didu Lod vdi co ndng E = 32 m! Tai thdi didm ban ddu vdr c6 van rdc v = 40,.5 cm/s vd gia tdc a = 8 m/s2 Pha ban dduBfrb dao dQng ld
(2)Trudng THPT chwy€n KHTN, Dgi hgc KHTN, DHQG Hd N|i Trung2/4 Ciu 14: Con l5c ld xo dao d6ng didu hoh vdi bi€n dO A = 2 cm,chu ki T = 1,2s, pha ban ddu lh t 13 Qudngdudng
con I6c tti dugc 4s ddu ti€n ld
4.26 cm 8.27 cm C.28 cm D.25 cm
CAu 15: Hai v4t M vd N *uat pfrai i1 g6c vd bat <tdu dao tl$ng didu hda theo cirng chiAu cria trgc Ox.tr6n hai J.O"g iita"e ,ong ,ong kii s6t vdi cing bi€n d0 nhung vdi hai chu ki lAn lugt ld Tr vd T2: 2T Tf si5 vAn t6c chirng g4p li
A 1/1 B, zlt c 4ll D- 2/3
ciu 16: Trong mQt dao dQng dieu hoi c6 chu lcy T thi thdi gian ngan nh6t d€ vft cti tir vi tri c6 c6 gia t6c cuc dai d6n vi tri gia tiic bing mQt nria gia tiic cuc ctai ld ,
A.Tltz B T/8 c.'Tl6 D.Tl4
CAu 17: MQt v6t dao itQng diAu hod: khi li dO cria vdt li xr : -lcm thi v4n t6c cia v0t lir vl : 5Jin cmls,khi li d9 crla vat xr= Jicm thi vin tiic cria v4t or: - SJlncmls Bi6n rlQ dao ilQng cria v{t li
A.2crn B.3cm C.4 cm D.5cm
Ciu 18: Didu ndo sau dAy kh6ng dring khi n6i vd s6ng dirng
A lfinh 6nh s6ng dttng lap lai sau l/4 chu kj' s6ng
B C6c phdn til mOi trulng & hai b€n mEt nft dao dOng ngugg-pla vdi nhau' C C6c bidm nam gifia hai nrit li€n tidp dao d6ng cing pha vdi nhau' D lfinh lnh s6ng dtmg lap l4i sau m6i nrla chu k!' s6ng
Cflu 19: Mach RLC ndi tidp gdm dien tr& R, cuQn cAm (L,r) vd tu diOn C Khi hi€u diOn thd hai ddu doan mach ld u
= 65{2cosatt (V) rhl cdc di€n dp hi€u dung trOn diOn tr6 vi cuQn d6y ddu bang 13 V cdn di0n 6p tr€n tu ld 65 V, cOng sudt ti€u thu tr€n tolq'-mach li 25 W Hq sd cdng sudt cfia mach-li
A.ill3 B s/13 c- tolt3
CAu 20: Trong doan mac[pRLC ndi tidp dang xiy ra c0ng huong Tdng ddn tdn sd dbng di€n vd giff nguydn c6c th6ng sd kh6c cfra mach, kdt luAn nho sau dAy dring
A.H{so c6ng sudt cria doan mach giim B.Cuong dd hi0u dung cfra dbng diQn tang
C.Uieu aien ind hi€u dung tr6n tu dlcn tang D.HiOu di6n thd hiOu dung tr€n cuOn cim giAm
Cffu 21: Mach RLC ndi tidp theo thrl tu gdm tu C, bidn tr& R vd cu6n dAy thudn cim L Det vdo hai ddu mach hi€u <ii€n thd ure = tjocos(lggnt - xl3) V Thay cldi R ta thdy khi It =.200f) thi cu&ng dd ddng diOn-nhanh"pha hcn hi€u di6n thd traiAau mach, P = P.- = 100W vd Ur-as = 200V (M ln didm nam gifra tu vd diOn tro) HQ thric dring ld :
A.ZL-Z| B.2Zr=7" c.zr=/1" D.3ZL- 22.
q;fuit21zEatdi€niipxoaychidu u =UJ-zcosatl(V)vdohaiddudoanmachABg6mthudncAmL,diQntrdRvd
tir Aien C mac nOi tiSp theo thir tu trCn Gqi Ur-, Un vd Uc tan tuqt li c6c cliQn 6p hiQu dpng gita hai ctiu m6i pnan tt Bi6t diQn rip gifra hai dAu do4n m4ch AB vudng pha so vdi diQn 6p gifl'a hai ddu do?n m?ch NB (<to4n m4ch NB g6m R vd C ) HQ thric ndo du6i ddy ld dirng ?
A.U2=U2n+Ui+Ui. B.U3=Ui+Ul+U'?.
C.Ui,=Ui+Ul+U'? D.U'?R=Ul+Ul+U'z
CAu 23: M4ch RLC nOi tiiSp giim cuQn ddy (L, r) vd dipn C D{t vdo hai cl6u do4n mqch mQt hiQu diQn th6 u:
60J7 sin l11zrt(V) DiCu chinh C de Uc : Uc,o: 100V Flieu dign th6 gita hai diu cuQn ddy khi ct6 ld:
A.40 V B 60 V c, 30v D 160 v
Ciu24: Mach dao d6ng LC gdm tu C = 200 nF vh cuQn thudn cAm L=2mH Bidt cudng d0 ddng diQn cuc dai tren
L ld Io = 0,5 A Khi cudng dQ ddng diQn tr0n L h i = 0,4A thi hiQu diQn thd gifra hai bAn tu ld
A IOV B.2OV C'3OV D.4OV
Cflu 25: Khung dao tlQng LC c6 C:2A pF, L : 200 mH Chqftt : 0 li lfc tU c6 hiQu di€n thi5 cyc tl4i Uo : 4 V
Ning lugng ili€n truong tai thdi tti6m t:0,125T ld
A.40 pJ 8.60 PJ C.80 FJ D' 100 PJ
C1uiSz Khi mic tu Cr vio m4ch dao d6ng thi m4ch thu dugc s6ng c6 budc s6ng 1.1 : 100 m, khi thay tu Cr bing tU Cz thi m4ch thu cluqc s6ng Xr: lS m V4y khi mic hai tU n5i ti6p voi nhau rdi mic vdo m4ch thi mach bit tlugc s6ng c6 budc s6ng ld:
A.25 m 8.30m C.50m D.60 m
D r2lt3
Cdu 27 z Mactr LC l! tuong gdm cuQn dAy L vi tu di0n C = 2O nF Khi dao dQng m4ch dn
_di._nh, 9!l t4 9V" dai cfra hi€u di€n rhd giffa trii Uan tu diQn l]r Us = I V vh cuong dQ ddng diQn trolg mech ld vi Io = 0,2 A Hi€u di€n th€ gita trai Uan tu dicn tai thdi didm tudng d0 dbng diOn mach c6 gi6 tri bang 100 mA ld
(3)Trtrdng TIIPT chuy2n KHTN, Dgi hpc KHTN, DIIQG Hd N|i Trang314 CAu 28: M4ch dao ddng LC c6 C = 0,2pF,L= 2 mH Do m4ch c6 di0n tr& R = 0,01C), ndn dao dOng m4ch tit ddn Dd tri dao dong v6i hiOu di€n th€ cu.c dai gita hai bAn tu di€n li Uo = 12V thi phAi cung cdp cho rnach mQt cOng suAt ld
A.P=24.10rW B, P=42.10rW C.P=64.10'6W D.' P= 72]0-6W
A.800 ps. B" 1200 ps C, <i00 ps. D.400 ps
L.2,5V. 8.5 V. c.7,5 V D.8 V
Cf,u 31: Trong mpng tliQn 34ha tei d6i ximg, khi culng dQ ddng <tiQn qua mQt pha ld cqc <I4i Is thi ddng tliQn qua CAu 292 Trong mQt m4ch dao <tQng LC li tirong dang c6 dao dQng di6n tir tg do Khoang thdi gian ngan nndt ae cucyng dQ ddng ttiQn qua cuQn cdm giim tir d0 lon cqc cl4i xuOng cdn mQt nfta dQ l6n cgc tlai ld 800 ps Khoing
thdi gian ngin nh6t dO ning lugng tir trudng m4ctr,g{4m ttr d9 lon cqc dai xulSng cdn mQt nria giri tri tt6 ld
Cf,u 30: Trong mQt mpch dao C6ng LC li tucrng, hic cuong dQ d.ong iliQn m4ch bing 0 thi hieu tti6n thii tr0n tU tliQn.bing f O V ffti nAng luqnf$r tru]ng trong cuQn day giip 3 ldn nAng luqng diQn tru&ng tq thi hiQu di€n thO tr€n tq blng
hai pha sE c6 cuong tlQ
A bdng Iel3 , ngugc chi6u v6i ddng trdn C bing Isl3 , cing chi6u vdi dopg tr6n
B bing lsl2 , cingchiAu vdi d6ng tr€n D bing Is/2 , ngugc chiAu vdi ddng tr6n
Cffu 32: Trong thf nghi€m Ydng vd giao thoa cria 6nh sr{ng don s6c Khi dit vdo mqt trong hai khe m6t bin mdt song song c6 chidt sudt n, = 1,5 thi ven ffung mm dich chuydn mQt doan xo, ndu thay bin mAt song song b6ng mdt bAn m[r song song c6 cing kich thudc nhtmg chidt sudt nz= 1,25 thi vin trung tam dich chuydn m6t doan Ih:
A: 0,5x, 8.2x, C.0,25x, D 0,75xo
C0u 33: Quang ph6 cia m{t trtri quan siit dugc tr6n mat d6t ld:
A Quang pnO vactr phSt xa B Quang ph6 lien tr.rc
C Quan[ phO vach fi6p thU D Quang ptrO tien tltc xen k€ vdi quang ph6 v4ch
Cffu 34: Trong'mQt thi nghiQm ldng v€ giao thoa 6nh s6ng, cho khoing c6ch gita hai khe a:2mm; tir hai khe d6n min D : lm; ngudi ta tto tlugc knoang v6n giao thoa trdn mdn ld i : 0,2mm Ten s6 cria bric xa ding trong thi r.rghiQm ln
A.7,5.1014112
CAu 35: Lu6.ng lSng kinh e6 A : 0,01 racl, ehi6t su6t n : 1,5; khe s6ng S nim trong m{t phing chung c[ra hai d6y, c6ch lSng kinh 20 cm Cho ),:0"6 pm S0 v6n sang quan srit dugc tr6n min c6ch ldng kinh 180 cm ld
Cffu 36: Trong thi nghiQm giao thoa l6ng, khoing crich tu v6n s6ng bQc 2 d6n vAn s6ng b{c ld 4,5mm Khoang cdch gifta hai khe a: lmm; tir hai khe d€n mdn D : 1,5m Budcs6ng rinh sring ld
4.27 8.29 c.31 D.33
A.4,4 pm B.0,5pm C ),6 pm D.0,7 pm
C6ar 37: Trong sr; giao thoa efra ludng guong phang ta c6 a:5.10r (rad), khoang c6ch tir nguiin s6ng d6n giao tuytin haiguong ld d: 50 cm Mirn d{t song song vdi tlo4n n6i 6nh crla S Khi )" 0,5 pm tr}n man c6 5l vdn s6ng, d6 hai m6p cria hQ v6n ld vdn s6ng Khodng cilch tri rrtdn dtin giao tuy6n cria hai gucrng ld
A.l:lm ts"1=2.m c 1:0,5 m D 1,5 ln
8.85.10t4H2 c.6,5.lar4rtrz D g,5.l0t4Hz
Cf,u 38; Chgn phuong 6n sai"
& Bdn ctr6t crtaiia hdng ngoai ld s6ng ttiQn tir B Tinh ctr6t nOi b4t nh6t cria tia hdng ngo4i ld tdc dgng nhiQt C Tia hdng ngo4i c6 kh? nang Aarn xuy€n ttit D Tia h6ng ngo4i tluqc dirng dC s6y kh6, suoi 5m, chgp furh
Ciu 39: Trong nguyOn tu Hitlrd khi Olectron nh6y tu qu! if4o N vA qu! tl4o K thi nguydn trt phdt bric x4 co budc s6ng 1., , khi Olectron nhdy trl quy M v€ qu! d?o L thi nguy6n tu ph6t brlc x4 c6 budc s6ng ld )" Chgn phuong 6n dring:
A.3\=44 8.27\=+4 c.254=284 D.2564=67s4
Cdu 40: Trong thi nghiQm Y-dng v6 giao thoa 6nh siing, khoang c6ch gita hai khe ld 0,5 mm, ttr hai khe dtin man
lit2 m Ngudn srlng dirng thi nghiQm gdm hai bfc x4 c6 budc s6ng 1,1 :450 nm vi l.z : 600 nm Tr€n mdur
quan s6t, gSi N4, }{ln hai cliOrnd cirng mQt phfa so v6i vdn trung tdm vi c6ch vdn trung tdm lin luqt li 5,5 mm vd 22 mm Tr€n do4n MN, s6 vl tri vdn sring trirng cia hai brlc xa ld
4.4. B d.3. D.2.
CSu 41: Mach dao ciOng ly tudng gdm cudn cim vh tu di6n c6 di€n dung C, mach hoat dOng binh thuong thi bit
duocs6ng 2o.NdumicsongsongtsCv6ituC'=4Cthimachbitduo.cbudcs6ng 4.Gi|tri z! tfnhtheo d
theo bidu thrlc:
(4)Trudng THPT chuy€n KIITN, Dgi hpc KHTN, DHOG Hd N|i
Cfru 42zTinh chu k!' b6n rd cira mQt ch6t ph6ng x4, cho bidt tai thdi didm t', t1i sd gifra Tai thdi didm t, sau t, 414 nghy, tli sd d6 lh l:63 r€'
-4,.69 nghy B 138 ngdY C'207 ngdY
Ciu 43: Tia R<rnghen c6
;.il;;;;ffi;ilGv6tuy6n.B.ctngbanc!Atvdi.s6ngdm-,.r;
C die;tich am D budc s6ng ldn hon budc s6ng-tia hdng ngo4i'
CAu 44: Trong thi nghiQm l6ng vA giao thoa anh sang khodng c6ch tir hai khe di5n man D :2m, khoing c5ch gita hai khe a : 0,5mm Trong khodng 2,8cm nguii ir ,tt5v c6 I ivdn sang liOn titip, hai dAu ld vdn s6ng Anh s6ng sir
ilt:.TJ"'c
s6ng ld:
B.0,5pm c.0,6pm D.0,7pm
Ciu 45: Khi chidu vlio catdr cia m6t td bdo quang di0n brlc xa c6 budc s6ng )' thi hi€u dien thd hdm ld 4,8 v' ndu chidu brlc xa c6 budc s6ng 2)" lhr niQu {iqq thd ham le 1,6 V' Gi6i han quang dien cira catdt l}r
A.3)" 8.4,1 c'sL D'64
cau 46: Tim kdt luan dring khi rr6i vd cdc day quang phd qlang phd ph6t x4 cfra nguyon tir Hydr6
A ;ay pu,"|"n na*oong ving tu ngoai B Ddy Baimer n6m virng 6nh s6ng nhin thdy
C.;;i;;i;;"il o*g"*rlgidng"ngo4i f'.'uay Lyman nam vung trlngo4i
Cfru 4i; M6t ngudn phZng x-e
"o .n"-ti b6n 16 T vh tai thdi
did.m'oan ddu c6 48No hat nhan H6i sau khoing thdi
thhnh hat nh6n
3Trhi ti sdtrcn lh c.6
Trang4l4 hat me vd h4t lh 1:7
D 552 nghy
D 5,80 MeV
WrOi ctrft A vi B co sti nat nnan D.514
Mg24 T?i thdi didm b6t ddu
D.9
gian 3T, sd h4t nhdn cbn lai lh bao nhiOu?
D 16No
A.4llo B 6No c.8No
cdu 4g: cho n6ng luqng li€n kiit rieng cna ] D ld ,12 Mev vd cria ] He ld 2,57 Mev N[ng lugng t6a phan
rmgnhi€thach ]D +]n -+ lHe-+ jn ld
A 1,45 MeV 8.3,23 MeV C' 3'55 MeV
C6u 49: Chu kl ban rd cua hai chdf ph6ng x4 A vi B tan tuqt ld Tn vir Te : 2T n Ban dAu hai nhu Sau thoi gtdn t : 4TA thi ti sO gir.xa s6 hAt nhen A vi B diph6ng x4 li:
Az Il4 8.4 C'415
CSar 50: Ddng vi Na24 ph6ng xq P vdi chu k!' bdn rd T, tao khAo s5t thi tf sd khdi luong Mg24 vb Na24 ld 0,25' Sau thdi gian
A.3 ts.5
-' HCt -[.d;,*^-",.",;;iFL -srlitini.,i; ->1"i!litl' r;orc iiiitna;.;el irz
rRl tor:o$2.?!! sd
(5)TRUONG THPT CHUYEN KHTN DAp ,N rHI'THO DAr Hoc LAN v NAM Hoc 20tt - 2012 nnON vAr lf
-n\
s\Tr$
iLZ.9-]ir\l"'-el
ffi\?'A
'W'r'+$