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Coi rnoi trudng khOng hdp thp arn... Trong mQt gid'ktrOi tuqrlg[r]
(1)Me da thi 161 Ho, tdn thi sinh:
56 b5o danh:
Cho: hing sO elang h = 6,625.10-3aJ.s, t6c dQ 6nh sdng trong chAn khdng c = 3.108m/s;
1u=93t,5MlV; d0londi€ntichnguy€nt5e=1,6.10-ieC; s6A-vd-ga-dr6Ne=6,023.i023mol-r
I PHAN CHU'NG CHO rAr cA cAc THi SINH (40 cAu, r& c6u I d6n c0u 40) t
Ciu 1.: Sa.tt chgn s6ng cta-rnQt m6y thu vO tuy€n g6m mQt cudn ddy vb mQt tu xoay DiQn tro thudn cria mpch le R (R e6 gi|tri r6t nh6) Di€u chinh diQn dung cria tu diQn d6n gi6 tr! Co OC Uit clu-o c s6ng
.,.\ L ,
di$n ttr c6 tdn s6 g6c co Sau d6 xoay tg mQt g6c nh6 dd su6t diQn d6ng cim-ring c6 gi6 trihigu dpng
khdng v1dOi nhqg cudng clO hipu dpng cfia ddng diQn mach thi gi6m xu5ng n lAn H6i di€n dung cua tg tllay dOi m6t luong bao nhiOu?
A,.2fRoco B nRroCo2 C.2nRorcj. D nRolCo
TRTJONG EH SP gA ruOT
TRUONG TT{PT CI{UYEN #E TI{I T'FX{I F4H F{QC,r-AN 6 {2812)
MGN V4T'LI
Thdi gtan ldm bdi : 90 phrir
(60 cAu tric nghi€m)
Cin2z Trong mach dao dQng LC lf tuong dang c6 dao dQng dipn tir tu vdi tin sli gdc 10000 rad/s EiQn tich cgc cl4i tr0n tg dign ln 10eC Khi dbng di6n m4ch Ih 6.10-64 thi diQn rich trcn tq di€n lh
Cdu 5r M6t s6ng hinh sin e6 b,iOn tlQ A (coi nhu khdng d6i; truydn theo phuong Ox tir ngudn O vd'i
chu ki T, cd budc s6ng fu Ggi M vh N lh hai di6rn nim trOn Ol<, d cDng mQt phia so vdi O cho
OM - ON = 5?,J3 Cdc phAn tu m6i truong t4i M vi N rlang dao dQng Tai thdi di6m t, phAn tri m6i hu0ng tai M c6 li dO 0,5A vh dang tdng Tgi thdi di€m t, phdn fii'mdi tq,rong t4i N c6 li dQbing
t; a - 11a.
2
CSu 6: X ln ddng vi chdt phdng x4 bi6n eOi tnanfr hat nhdn Y tsan ctiu c6 mQt m6u ch,5t ph6ng xp X tinh k*ri6t T4i thcri diem i nao ao, ti si5 gifa sii hat nh6n X vh sd har nhf;n Y trong .5u ia tE ocn thoi di6m sau d6 12 ndrn, ti sd d6 li] 1/7 Chu ki b6n rd cria h4t nhhn X lb
q
f
nB
A.8.to-roc 8.4.10-10C C.6.10-10c D.2.10-10C
CSu 3: Ph6t bi6u nho sau ddy ld dring vd diQn tu trulng?
A EiQn tich dao dQng khOng thd bfc x4 s6ng diQn tir khOng gian
B Ejjn trulng do mQt dipn tfch cli6n dao dQng c6 ftr6 lan guyen kh6ng gian du6i dpng s6r[ "
C TOc d0 cria s6ng diQn tir chdn khOng le nhd hsn t6c dO Anh s6ng chdn khOng D DiQn tfch dao dQng bfc x4 kh6ng gian s6ng diqn tir v6i tAn sd Uing mQt nira tin sO dao dQng cria n6
Cf;u 4: Trong thf nghiQm I-Ong vO giao thoa iffi s6ng, ngudn s6ng phdt d6ng thdi hai bric x4 don sic: birc xp lt = 560 nm vd bric x4 rnhu d6 c6 budc s6ng X"2(Lz nimtrong khoing tir 650 nrn d6n 730
nm) Tr0n mbn quan sdt, gita hai v6n s6ng gAn nh6t vi ctng rnhu v6i vdn si{ng trung tdm c6 vdn si{ng rndu t16 Gi6 tri cria }.2 lh
A.700 nm B 650 nm C 670 nm D.720 run
C6u 7:.tong ph6ng xp B- lu6nc6 s1r b&o toln
A sO nucl6n B sO notron C cl6ng n5ng A 60 n6m
s.-le.
2
B 12 n6m
C _A
C.36 ndm D.4,8 nim
D kh6i luo.rg
THPT CHUygN pAl HQC SLIPHAh{_THI THIJ EAr HQC LAr\i 6_20t2_M6n Vat if
TrangllT - lv.Ia de thi 161
(2)CAr.r 8: Dao d6ng c0a m6t vAt ld tdng hop cira hai dao ddng thdnh phAn cDng phuong, cirng tAn s6:
F
,r, 4,Bcos(10,,12r+-)(cni.t;-l=Acos(rcJit-tc)(cm)" ei6t t6c d6 ctia v6t tai thoi di6m d6ng ndng bing lAn the n/ang fa 0,3G (m/s) Bi6n dQ ,A2 bing
4.7,2cm, B 6,4 cm C.3,2 cm D.3,6 cm
CAu 9: Trong thi nghigm giao.thoa r{nh s6ng v6i khe ldng, khi.dDng 6nh si4ng c6 budc s6ng 600 nm
trOn mQt doarr rQ.ng L tlluOc midn giao thoa ti6n mbn ngucri ta d6m dioc 7 vdn"s6ng mit 6 2*ep ta frui vdn sdng N€u dDng 6nh sdng c6 bu6c s6ng 400 nm thi s5 vdn s6ng quan s6t duoc tren Ooan eO ta
A" 10 B 13 , C 11 D.IZ.
C6u L0:_Cu6n ddy c6 diQn tro thuAn R vb d0 r+ cAm L mic vdo diQn 6p xoay chidu u =250J1'cosIA)m(V)thi cuong dQ dbng diQn hiQu dr,rng qua cuQn dAy lh 5A vi ddng didn nhy l6ch phu 4 so v6i diQn 6p u Mfc nOi ti6p cudn ddy vdi doan mach X dd t4o thinh doan mach AB r6i I4i ' 3 E - -^-r '^':'-'r
cldt vio hai diu.clo4n -l na4ch AB diQn rfp u n6i trOn thi cucrlg dQ ddng di6n hiQu dqng Q qua mach ld 3,4 vd di6n 5p hai cl6u cudn d6y vuOng pha v6'i diQn 5p hai dAu X COng su6t ti6u thg tran db4n m4ch X lh
8.300w.
Cdu 11: rrSng cdc tdp hgp hpt nhdn sau, hdy chon t6p hqp md d6 tdt cd ekchat nhdn ddu thudc cDng mQ!!q ph6ng xg
'i: ;Bts, Ffl,,t:
"t?tE
H#,*:?;
C.Th237 iFtu"o ; T1206 ;Bi2t2; Rn22o
CAu 12: Tr6.n do4n mach xoay chidu kJ
A U'io;'Thztu tPY,zoE ;Ra226 ;Po"o C.Th232 iRu"o; T1206 :Bi2r2; Rnzc
ts Am]]l ; Np"t ;F.a22s i Rnzts ; tsitot
D.Np"t ; Ru2" ; Bi2r3 :Tfoe ;Fr"l
CAu 12: Trdn doan mach xoay chi6u k-hdng phdn nh6nh c6 bi5n di6m theo dring thri rU,A, B, C vi D. Gira hai didm A i,a n hi c6 tr; cxiQn, giua fiai Jiern;; C
"rti "o oie";J;;;,';i*u z oic c vd D chi c6 cu6n ddy thuAn cim EiQn 6p hiQu dgng hai ttiiim A vi D le 100.6 V vi cudrng dg hiQu dgng qua m4ch li 1A- DiQn r{p tric th}i trOn do4n AC v} trOn doan BD lQch pha - Tf nnuns sla
J
tri higu drpng thi b6ng Dung kh6ng ctia rir diQn lh
A" 40 fi. B 100 CI c 50 e, D 200 o.
|u.131 ?9ry *?9|rAq gdm diQn lrd R, cuQn.thuAn cdm c6 dQ ts cdm L vi tu ctiQn c6 diQn dung C
iroi ti6p theo dring *ui tu rr6n Gei rvr dl6m nt5i giua.uO'i oav
"aiu oG"vdl.j"Jil;d,";
lo,n m8c gitlu $ vi M Dign dp o hai dAu mpch AB li ues = l0OJ7cos@r (V) Bi€tZl-Cr:] = t.
S6 ctri cna v6n ki5 bang
A.8OV: 8.200v. c" 100v D i20v.
A;200 W
I
d t= 21"4- "
\+ 12
A khdng phdtdn nio C ph6tdn e1"
c.2ooJtw. D 300.6 w.
Cf;u L4: Cho rnach rli€n xoay chi€u n6i ti6p g0m cudn ddy thuAn cim cd dQ tg c6m L thay cl6i cluoc,
tp diQnc6 di$n dung C vh dipn trd R Cd hai gi6 {i khdc cria L la Lr va L2 fti diQn rdp higu dpng
tr6n cu6n cdm cd cirng m6t gi6 tri Gi6 tri eria I- dd dign rdp hiQu dr,rng tron cuQn c6m cgc A4i ta: B L=t"+I-
2' ca V U-r- 1.4
2(4+ tz) D L= tr+t"\1"
C6u 15: &IQt sgi ddy dhn h6i, dei 60 cm, rnQt dAu c5 dinh, dAu {ugc gin v6i m6t thi6r bi rung vdi
tda sd f Tr0n dAytq,o.thinh mQt sdng dirng 6n dlnh v6i bqng s6ng; coihai diu day ld hai nrht i6ng Thdi gian gifra l6n iiOn tirSp soi day dudi ihing ta 0,02 s roc?q triyen rong trc"Jay ra
A v=0,6 m/s" B v= 15,0m/s C v = 12,0m/s D: v =Z2,im/s.
C6u L6: M$t ph0t6n c6 n5ng lugng e' bay qura hai nguyOn tri dang d mric kich thich Sau d6 ngoii
photon s' cirn c6 them photon €r vi €z <ti PhOtOn s2 bay nguo c huong v6i ph0t6n e, S6ng diQn tir
!"gJfi phdt0n t1 nguoc pha vdi s6ng diQn tir img v6i phdt6n e' PhdtOn ndo dugc ph6t x4 cdm
lmd'/f
ts ci hai ph6tOn €1 vd 12
D phdtdn e2
T}IPT CIflIYEN 94X HQC SIJ PHAM_THI THI' DAI HQC LAN 6-2012_ M6N V$t If
'Trang217 - MA dC thi l6l
€-(F*+*
(3)Cdu 17: Cho ph6n ii'ng hat nh6n: lD+'rr -+ lne+n Cho Ulet AO htrt kh6i khi tao thhnh c6c har nhdn D, T vd F{e lAn luot li: Amo=O,\A24u;Amr-0,0087u;Arr'"=0,0305u Cho 1u =
931,5MeV/c' Neng lugng toA cira phAn ri'ng ld
A 18,07 MeV B 18,02 MeV C 18,16 MeV D 1,81 MeV Cf;u 18:'M6t vAt dang ciao
{Qne diAu hda T4i vi tr( clQng ning bing hai l6n th5 n5ng, gia t6c cia vdr
c6 dq ldn a Tai vi tri mh thiS ndng bing hai lAn dQng nlng thi gia t6c cria vAt c6 d6l6n bing
n.tB.a' u'fr^
t=
c !1o.
J
C.6u 19: Tir khdng ngudi ta chi6u xieritOi mdt nu6c nim ngang m6t chim tia sring hep song song g6m hai 6nh s6ng don sbc: miu ving, mhu chhm Khi d6 chr)m tia khdc xa
A child chr)m tia miu vhng cdn chim tia mhu chim biph6n x4 tohn phAn
B v6"n chi ld mdt chirm tia s6ng hep song song
C gOm hai chirm tia sdng hgp lh chim mdu vhng vh chirn mlu chdm, tl6 g6c khric xp cria chtm mhu vhng l6n hcrn g6c khric xa cria chDm rnhu chhm
D g6m hai chtm tia s6ng hgp lh chr)m mhu ving vi chilrn mhu chhm, d6 g6c khric x4 cria
efDm miu vdng nh6 hon g6c khric xp cria chtm mhu chim
CAu 2OfMQt " mSch tli€n xoay chi€u RLC mfc nOi tiiip Ggi IJR, fJL, Ug lin luot ld diQn 6p hiQu dqng
,:
gifa-hairfAu di6n tro R, hai dAu cuOn cim thuAn L v) hai d6u tu diQn C gi6t Un = UL = U" no ,u"n
pha gieddign 6p hai tliu cfoan m4ch vh cucmg dQ ddng cti6n c6 dgc tti6m ld
.N A, -"=.
4trrt
A lsid.2"
nN
r)
-.r
8.2 giir
C N =. (4nr)"
A 1' L - gl0
+
D ^6 a
D.4zn2N
D.4 gid
t
tru
CAu 2L: Doan mpch tliipn xoay chi€u RLC m6c nOi titip dang cd tinh dung kh6ng Khi ting tin s6 cria dbag diQn thi hQ s6 c6ng su6t cfia mpch
: ^ , TC
A u nhanh pha hcrn i mdt s6c :.
3
C u nhanh pha hon i mQt g6c 1.
4
A kA6ng ddi B bing
B u ch6m pha hon i m6t g6c .I. J D u chdm pha hon i mQt g6c T.
4
C gidrn D ting.
Cdu 22; Eoan mpch AB g6m c6c phAn ru m6c theo thr? tg: diQn trd thuAn R, tu diQn c6 cli€n dung C, mQt hQp clenx di6m vr o giira R va c, di6m N gita i ve x Hai diu NB ;;il Ay
"6i ;; ff;
K(dien tro cria kh6a K vd dAy n6i khOng dring ke) Cho uas = U"Dcosrot Khi kh6a K cl6ng thi Uana
= 200V, UuN = 150V Khi kh6a K ngit thi UeN = 150V, UNe = 200V C6c phAn ff fong hOtX cO tne
1b
.4 diQn trs thuAn B cu0n cAm thuin nOi ti6p vdi tu rli€n
C ttidn tro thuin noi ti6p voi cuQn cdm D diin trd thuAn r6i tief i,oi1u iffe"
Cf;u 23: M6t ngudn 6rn c6 cOng suAt {, phat dAu rngi huong kh6ng gian Coi rnoi trudng khOng hdp thp arn cucrng cf6 6rn I tei di6m cdch ngudn mdt khoing r c6 dd lcrn beng
C6u24: Khi dua mQt v$t lOn mQt henh iinh, vat 6y chi chiu mQt lpc hdp d6n UinS ] tgc h6p d6n mi
n6 chiu tr6n mit tr6i dht GiA sri mQt ddng h6 qu6 llc chqy rht enir*txac tren mflt tr6i d6t dugc dua l€n hinh tinh d6 Khi kim phrit cria ddng hd ndy quay dugc mQt vdng thi thdi gian thyc triii:
CSu 25: MOt lic lD xo g6m v{t nh6 kh6i luqng m = 100 g vb ld xo nhe c6 dQ cring k = 1'00 N/rn
dao dQng di6u hba vdi biOn d9 A = 9 cni L6y gOc thoi gian ld hic l6c dang Ai tn"-o chi€u duong cria truc toa d6, tpi d6 thii nSng bing ba ldn dQng ndng vh c6 t,ic d6 clang gihm.Ldy nz =l}.phucrng trinh dao clQng cfra l6c lh:
THPT CHU-TEN E}AI FIQC SU PHAM_THI THU EAI HQC LAN 6_2012_ M6N Vflt If
(4)W" x=9cos(lor+fl(cm).
s",r=9cos(lor *ff)t *l
CSu 26: Cho vat dao d6ng diiiu hda biOn cld A, chu ki T Qudng cluong l6n nh6t mi vdt di duo'c kho6ng thdi gian 5T/4lil
A.2,5A- " B" 54 c" A(4 * .51 D" A( + * Ji).
C6tt27: MQt kim lopi c6 c6ng thodt 0lectron kh6i kim lo4i d6ld.2,2eV Chi6u vdo b0 mpt t6m kim lo4i d6 c6c birc xp c6 bu6c s6ng 1"1 = 0,662 prh, Iz = 0,577 Fm, I: = 0,546 pm vd ]'q = 0,491 pm C6c
birc x4 c6 thii gdy duo c hi0n tucmg quang dien ddi ,,di kirn lo4i nhy ld
.4 chi bric xa Lq ts c6 b6n birc xp tr€n C L2, ).3 vh 1.a D l,: vi lq
C6u 28: MQt l6c lb xo gdm ld xo c6 elQ ctmg}} Nim vd viOn bi c6 khOi l*gng 200 gdao ddng
diAu hoi Tai thdi di6m t, vdn tiSc vh gia t5c cria viOn bi lAn luo-t ld 40 cm/s va ad5 m/s2 BiCn dg dao dQng cria viOn bi lh
,4" x=9cos(lor -[1rc*).
C x=9cos(lor-fl f.-1.
,A.8 cm E 16 cm C.20 cm D.4 cm
C6n 29: tsri"c x4 c6 tAn sO l,yn nh6t b6n bric x4: h6ng ngo4i, tri ngo4i, Rcm-ghen vi gamrna lh b'irc x4 'r,,
A Ron-ghen ts gamrna C h6ng ngo4i D tri ngo4i
C6u 30f Th.irc hign thi nghigm Idng v6 giao thoa 6nh s6ng Khoing cdch g.itra hai khe mm, rnin quan siit tl{gsong song uT Tit phing chua hai khe vh cdch hai g*
? f Chitiu ldng hai khe bing,6nh
sil.ng tr6ng cb budc s6ng 0,400 prm 5.I < 0,750 prm Bu6c s6ng lon nh6t cria cdcbtrc x4 cho vdn t6i t4i tli€m N t€rf rnin, cich vAn trung tdm 12 mm, lh
4.0,685 prn 8.0,735 pm C.0,635 pm D.0,705 pm
.CAu 31: MQt lic ld xo tl{t trOn mlt phing nim ngang g6m lb xo nhe c6 tlQ cimg N/m vd vpt nh6
i lugng 40 g He s5 ma s6t truort gifra v$t vi m{t phing ngang le 0,1 Ban dAu gif vAt o vi trf lb xo
bi gian 20 cm r6i budng nhg cIC l6c dao dQng t8t dAn Liry g = l0 nt/sZ fe ttr hic diu cho d6n thoi di€rn t6c dQ cria vdt bft Aau gi6m, th6 ndng cira l6c lb xo dd gidm mdt luEng bing
A" 39,6 mJ 8.?4,4mI. C.79,2rnl. D.240 mL
u 32: Chgn ph6t bi€u sai n6i vd laze?'
A Nguy0n tdc ho4t ctQng cria laze dr,ra tr6n viQc fmg dpng hiQn tugng ph6t x4 c6m rlmg
B Trong laze rubi c6 su bi6n AOi Oien ndng thdnh quang ning
C De c6 chr)m tialaze, nguoi ta cho c6c photon truy€n qua lpi mdi trudng hoSt tfnh nhi6u l6n
D Tia laze c6 th€ gay hiQn tugrg quang di€n v6i mQt sO kim loai
CAu 33: MQt ngudn 6m lh ngudn di€m,'det t4i O, ph6t 6m eling hudng m6i trudng kh6ng c6 sg h6p tfru vh phdn xp drn.lfai mQt di6m M mr?c cudng dQ dm lb L1 = 50 dB Tai di6m N nim trOn duong
thing OM vh d xa ngudn dm hon so v6i M mQt khoing ld 40 m c6 mric cudng d0 Am ldL2 = i$,Q/
dB Cho culng dQ dm chuAn Io = 10-12 Wm2 C0ng su6t cria ngudn 6m lh
A,2,513 mW E,0,2513 mW C.0,1256 mW D 1,256 mW
Cf;u 34: Theo m6u nguyOn tri Bo thi nguyOn hr hidr6, b6n kfnh qu! dpo dirng cria electron tr€n c6c qu! d4o lh rn = n% , vdi 16 = 0,53.10-10 m' ; n =1,2,3 lh c6c sd nguyen ducrng ioong img vdi cdc
mfic ning lugng cria c6c trpng thr{i dung c{ra nguydn tu Gqi v lh t5c d0 eta electron trOn qu} d4o K-
Khi nhdy lOn qu! d4o M, elecffon c6 t6c dQ bdng 8.3v.
JE
C6u 35: Eo4n m4ch AB gdrn mqt dQng co diQn mic n6i titip vdi rn6t cu6n dAy Khi ddt vdo nai aAu
AE rnQt diQn 6p xoay cFridu thi diQn r4p hai diu dQng co c6 gid tri hi6u dpng bing U vh sdm pha so v6i
THPT CH{.IyEN DA.I HQC SLIPI{4}YI_THI TT{{JDAI HQC LAtil O_ZOiZ_ VIOn Var li Trang4/7 - Ma dA rhi tr61
6.Y
(5)ddng <li6n ta{ ni6n rip hai dAu cudn clAy c6 gi6 tri hi€u dqng b6ng 2{J vd s6m pha so v6i ddng di6n
12
\r
Id+ Di€n rip hi€u dung giira hai dAu doan mach AB li crla mang di€n lh
l2 0e
^ uJi. 8 uJ7. C UJ'. D UJJ.
C$u 36: Mdt ddng hd qun l6c ch4y dring gid 6 dO cao ngang mgc nu6c bi6n B6n kinh Trdi Oat ta 6400 km': Dua ddng hO t6n dinh nfi cao h = 2,5k<rn (coi nhiet dQkh6ng OOi) ttri m5i nghy, d6ng h6 sE
A ch4y chdrn 33,75 s B chay chAm 50,5 s C chpy chdm 67,5 s D chay chQm25,25 s
Cdu 37: Ngucri ta t?o ph6n *ng hpt nhAn bing c6ch ding prOton bin phd hat nh6n eone dfug ydn Hai h4t sinh le heli vh X Bi6t prdtcn c6 dQng ndng Ko - 5,45MeV Hat hOli c6 humrg bay vu6ng g6c vdi hudng bay cria pr6ton vd.c6 tlQng n6gg SH" = 4MeV Cho ring dg lcrn c0a khiii lugng cira
m6t hpt nhdn (do bdng <lon vi u) xdp xi bing s6 khdi A cfia n6 PhAn r?ng trOn
a tOi ndng luorrg bing2,125 MeV ts t6a ning lucrng bingl,225 MeV
C thu ndng lugng bing1,225MeY D thu nlng luong bing 3,575 MeV
C6u 38: Do4n mpch RLC khOng phdn nh6nh mic vio mang di€n tAn sd al1 thi c6m khdng ldZt-t vd durrg kh6ng litkr Nliu mic vho m4ng cliQn c6 tan sii ro2 thi mach xhy racQng huong Chqn h0
thftc iliyfg?
I-A" a) = o.2,, B 0) = c0^ lt" c, a, = r" IZo D er) = o).ztr
:j 'zr, ' "\zr, '\zr, ' 'za
l,
Cdu 39$Oay dbn ddi 50 cm Vdn t6c truydn s6ng trOn ddy lb 400 m/s TAn s6 cria Am co bdn mh dAy ddn dao$Qng ph6t li
A 800 Hz ts.400 Hz
CSu 40: DFt cliQn 6p xoay chidu u = Uocos(12\nt - n/2) (V) vlo hai dAu mQt tq diQn thi cuong dQ
ddng diQn cgc d4i qua tu li Is Cuong dQ dbng eliQn tric thoi qua tU dign bin1lo/2 t4i thoi di6m
C.300 Hz D.200 Hz
t
nru
II PHAN nfpNC : M6i thi sinh chi lhm tr trong 2 phf;n : phin A ho{c phAn B.
A Theo chuoarg trinh Chu6n ( tir c6u 41 tl6n c6u 50)
;
Cf;u 41: Hai dao dQng di€u hoi ctng phuong, cl)ng tAn s6 c6 phuong trinh 4=\cos(an-nt6) vit yr= \cos(ar-7r) cm Dao dQng t6ng hqp c6 phuomg trinh x = gcos(cot+g) cm E6 biOn dQ Azc6 gi6ttt
cgc dqi thi Ar c6 girA tri
A t1720 s" ts" 1/180 s C 1/360 s D.11220 s
A 15"6cm. B.9rEcm. C.7cm D 18"6cm.
w.9avo C.94Vo D.92Vo
THPT C}IU-YEN DAI HQC SUPHAM-THI THIJD4,I HQC LAN 6_2012- NI6N Vat Ii TrangStT - I\,{6 d€ thi 161
CAu 42: MQt s6ng dm c6 tAn si5 f lan truydn khOng gian Ni5u ndng lu-o ng s6ng dm et6 truy6n
qr-ra mQt don vi dign tich d{t vu6ng g6c vdi phucrng truydn am rong mQt clon vi thdi gian tdng lOn 10 lAn thi
A mr?c culng dd dm tdng th€m 10 dB B t6c dd truydn Am tdng 10 lin. C dQ to cira dm khdng d6i D culng dQ Am kh6ng dOi
CAu 43: Di€n nhng o'm6t trgm phdt <ti$n dugc truy6n di dudi diQn 6p (,3 dAu ilucrng d.aV tA| le 20 kV, hiQu sudt cta qu6 trlnh truyAn t6i diQn th H = 82Vo.I(hi cdng su6t trufin di khdng d6i, n6u tdng diQn 6p (d dAu ctuong day t6i) 10n thOm 10 kV thi hipu su6t cria qud trinh truy6n tdi diQn se dAt gi6 tri h
4.,88Vo
Cdu 44: Ngyoi ta k6o qui cAu cria l5c clcvn O6 Oay treo hcrp v6i vi tri cdn bing mQt g6c 600 r6i tira kh6ng v$n t6c ban ciiu 86 qua mqi lgc cin Fh6t bi6u nbo sau ddy lh dring? _
A" Con lic dao dQng kh6ng diEiu hba, ndng luqng dao d6ng khbng b6o tohn
(6)c6u 45: Doan mach AM chria cu6n diy c6 di€n trd hoat dOng Rr = 50f)-vh cdm kh6ng zu = 50{2 m6c nOi ti6p vdi doan rnach MB g6m tu dien co dung khrlng Zc m&c nOi tii5p vdi cuQn dAy c6 di6n tr6' hopt d6ng Rz = i00 f: vd c6m khdng Zt-z = 2A0 Q " D6 UAe = Uer,t * Unre ihi Zc bdng
A 50(). B soJt a. c" 100() D" 200fJ
C6u 45: Theo thuy6t lugng t{r 6nh s6ng thi di€u nho sau dAy lh E<h6ng dfng? A" Ph6i6q chi tdn tai cr tr4ng th6i chuy6n ddng Kh0ng c6 ph6t0n dring y0n
B Trong shdn kh6ng c6c ph6t6n chuy6n dQng doc theo tia s6ng v6i tdc dQ bSng tdc clQ 6nh s6ng
C Ning lugng crtacdc ph6t0n nhu vdi mgi chr)m 6nh s6ng.,
D Cudng dQ cria chilm sdng ti 16 vdi s5 phOtdn phdtra 1gi6y
Cdu 472 Sau m6i gio, sr5 nguy0n tri ctra ddng vi ph6ng x4 cOban ffCo gitm3,8Vo.Hings5 ph6ng x4
cria t.ziqi c6ban lh
10-as-r B 1,076.10-5s-1 c 7,68 10-5s't D.2,442.70-ss't
-Cdu 48: C6ng suSt phdt xp ctra M{t Trdi lh 3,9.1026 W Cho c = 3.108 m/s Trong mQt gid'ktrOi tuqrlg
IUdt Trsi eiim mdt
A 3,tilo'3 kg B o,?8.10r3 kg
B frong y t6 ae chgp diQn, chitiu diQn
C cl6 chup enh b6 mflt Trdi p6t nr
vefinh.-n dc tim t<truyiit 4t bOn sin phAm bing kim loqi
c 4,68.1021 kg D 1,56.1013 kg
CAu 49: M4ch dao tlQng chgn s6ng cria mQt mriy thu vd tuytinbit tlu-o c s6ng c6 bu6c s6ng 120m Mpch
gdm cuQn cpn -Jru6n L vi tp diQn c6 diQn dung C D6 mgch bdt duo c s6ng c6 bu6c s6ng 30 m, nguoi ta dfing tg diQ;t6 diQn dung C6 ghdp voi tu dien C Gi6 f!cria C.o vi c6ch $69Ie
i Co_:ftC ghdp song sorft voi C B.Cb= 3C ghdp n6i titip.roi C C C6= Crt ghep noi ticp uoi c D C6= C/15 ghdp noi titip voi C Cf;u 50: Ti+h6ng ngoai ilugc dDng
4 ec nrdv6t iirit tr0n b€ m[t sdn ph6m bing kim lo4i'
ts Theo cteuong trlnh Nf;ng eao ( tr0 cdu, til c6u 51 d6n cdu 60)
l6u 51: Khi c6c photon c6 ndng luo ng hf chi6u vho mQt t6m nhOm' (c6 c6ng tho6t electron lh A),
6c elechori quang cti6n dugc ph6ng c6 dQng ning cpc dai lh K Ndu tdn s6 cria bfc xa chiOu t6i t6ng g6p d6i thi clQng ning c$c clai ctacdc electron quang diQn ld
A.K+hf B.K+A+hf C.K+A D.LK.
CAu 52: Ngudi ta xdc dlnh t6c ilQ cfia rnQt lgudn 6m bing ci{ch sri d1rng thitit bi do tdn s5 am fhi
ngu6n am Jhuyen ddng tiring d€u lai gAn thi6iUi dang dung yOn thi thiiSt bi du-o c tin s6 dm lb 850 H-2, cdn nguAn aminuyiS"n dQng th"Eng dAy voi cr)ng t6.c Oo d6 raxathi6, bi rlti thi6t bldo dugc tAn
sii am lA 600 Ftrz Bii5t ngudn 6m vh thiCt bi lu6n ctng nim tr6n mQt dtrong th[ng, tdn s6 cfia ngudn
dm phdt ]i ktrrdng eOi"va tdc d0 truydn Am *Oi t**g bing 340 m/s T6i d0 cria ngudn Am
ndy ld
A.40,85 m/s 8.60, 25 lrr,ls C 58,62mJs D.48,30 m/s
CAu 53: Electron e6 kn5i lugng nghi m.=9,l.l04tkg, trong ddng h4t B- electron c6 v$n t5c a^
, = 4 = 2.108 ml s.Ift'r6lluo'ng cta electron d6 la
J
a tg,os 1o3r kg ts 6,83.10-3rkg c 15,i0.10-31 kg D,
12,21.10'31kg-CAn 54: MOt dTa m6ng, phing, ddng chdt c6 bdn kinh 2m c6 thd quay dugc xung quanh mOt tryc di o,ua tdm vA vuong g6c v6i m9t phing
{u.76"^dtlF,u1-9 fla mOt mdmen lgc 960 N.m kh6ng d6i, dia
chr.ry6n dQng quay quanh trr,rc vfi gia tdc goc rad/s' Khdi lugng cria dia lh
A, 96Ctkg 8"240k9. C 160 kg D 80 kg
tef:flilllijiXffi
i:ffHu?trI* ui*, mqi phan dr cria 1,rt r$n d6u c6 gia t6c g6c bing
uOn c6 motnen qurin tinh nhu
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Trung6i7 - Me dC thi 161
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(7)S Momen qudn tinli cria vAt rfn ludn c5 tri sii duong
, C" ftAomen qurin tinh c*a vdt rin d6i v6'i m6t truc quay ddc trung cho mfc qudn tinh cira vAt d6
OOi vOi chuydn ddng quay quanh truc D" Do'n vi momen qu6n tinh Ia kg.*'. CAu 56: Fhdt bi6u nlo sau dAy lh khOng dfng?
A" Vl6men qu6n tinh cria vdt rin dt5i v6i mQt truc quay cing l6n thi sftc i cria vdt chuy6n
dQng quay quanh truc d6 chng l6'n
ts Mdmen qudn tinh cria vAt rfn phir thuQc vdo vi tri truc quay vh sg phAn OO t<trOi lugng OOi vOi
truc quay '
C M6men lpc tdc dung vdo vAt rfn ldm lhay AOi tOc d6 quay cria vAt D M6men luc ducrng tdc dung vdo vAt r8n lim cho v$t quay nhanh dAn
C6er 57: C6ng d€ tdng t6c mQt cdnh qu4t tii trpng thdi nghi d6n c6 tdc dQ g6c 200 radls ld 3000 J
MO men qudn tinh cfia c6nh qu4t <16 d6i vdi tryc quay dE cho li
A.0,30 kg.-' 8.0,15 kg.*t C 1,50 kg '. D.0,075 kg.tn'
D 10 804 n6m
,q
t
nru
CSm 58: Nhpn xdt nho sau ddy ld dring?
A C6c v4t thd quanh ta c6 mhu sic kh6c li khd ning phdtraedcbtrcxa c6 mhu sic khdc cfia trmg v$t
B: C:F r{nh s6ng c6 budc s6ng (t6n sOl, t*ra9.nha,u thi ddg bi m6i trudng h6p.tf,u nhy C Cim nhdn vO miu s6c cria c6c vft{uy d6i thay d6i m}ru sdc cia ngudn chiOu sdng vpl
D:.CAc6nh srdng cd bu6c sdng (tAn sd) t<irac nnau ttri OAu b! cric v4t phan xg ftoic t6n xa) nhu C,6u 59:;M0t l6c vdt li c6 mO men qudn tinh AOi vOi truc quay li I, cd khoing c6ch tir tdm
diin t4rcfiuay 1I cl, dao dQng tai noi cO giat6c roi tu vdi ctru ti ri€ng lh T Kh6i lugng m crii con l5c ld :
A Zilr ' B" 4o'I= c " 3g- D.4nzI
gdT' gdT" 47T'7" gdT
Cffu 60: MQt khric xrlong chfta 500 g Ct'ldilng.vic6cbon ph6ng x4) cd c16 ph6ng xa li 4000
phAn ri /phrit Bilit ring dQ ph6ng x4 cira co thti s6ng bing 15 phdn /phrii tfnh trOn 1g cdcbon Chii ki bdn rd, cta Cta ld 5730 ndm Tu6i cria mAu xuong li
.A.4200 ndm 8.2190 nim C.5196 n6m
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4 D C A B 34 D B D C
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9 A A A C 39 ts A D A
N10 D D A D 40 C D D C
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13 C B B C 43 D A D A
\ x4 A A L B 44 C B A D
,[s B D B B 45 C C B A
T6 A ts B D 46 C ts C B
17 A B B B 47 B D A D
18 A A B B 48 D B D
L-79 r: ('\ C B 49 D D D B
20 D U C 6 5{} t- D C D
21 D L- A r 51 A B D D
AL \- A A D 52 (1 B A A
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25 A A B D 53 A D B A
26 D B B A 56 D DLE 11 C
27 D D D B E17JI B C C L
28 B r1 l:L C 58 \-t'\ R t C
29 B D r A 59 B t A