www.VNMATH.com rRIroNG rHPr DAo DUY Til of nrr firtl o4r Hgc r,.A,x nrtj v Ni,m zoro Mdn thi: VAt ry, mdi.L Thdi gian ldm bdi: 90 phtit; kh6ng kii thin gian phdt di M5 thi 209 Hg, tdn thi sinh: 56 b6o danh: Ciu 1: MQt s6ng ngang truyAn theo chiAu duong tqc Ox, c6 phuong tinh s6ng le u=2cos(4nt-O,02rx);trongd6uvixtffibengcm,ttinhbAngs.S6ngniyc6budcs6ngld A 50 cm 8.200 cm C 150 cm D 100 cm Cdu 2: Nguy€n tic san xudt ddng diQn xoay chiAu ld A ldm thay t16i tu thdng qua mQt m4ch kin B lAm di chuy6n mqch kin tir truirng theo phuong song song voi tu truirng C ldm thay tl6i tu th6ng qua mQt mach kin m$t crich zudn hoan D iam thay d6i tir truong qua mQt m4ch kin CAu 3: MQt l6c ld xo dao dgng diAu hda vsi bi6n dd cm Lric t = , 18c qua t x = 3J-2cm theo chidu duong voi gia ti5c c6 d0 lon ,lZ t**f tri c6 li d0 t2 Phucrng tinh dao dQng cia lic lA A x=6cos9t(cm) B x =0,",(i-f)t.,1 ' c.x=6"or[!*1\' \3 4J(cIn)' D'*=6cos[3t+;J(cm) / n\' CAu 4: Trong mgch dao dQng diQn tu LC, niiu di€n tich ctrc d4r t€n tg diQn ld Qo ud cudng tlQ dong diQn cgc d4i m4ch la I0 thi chu k) dao dQng diQn tu tong mpch li A T= zn! Qo B r=2n9 Io C T= znLC D T=2re6I6 Cdu 5: D6 thu dugc quang ph6 vph hdp thrr thi A nhiet d0 cua drim hcrn hay hdp thU phai bdng nhiet dq crla ngudn s6ng ting B nhiet dQ cua d6m hsi hay khf h6p th\r phai nh6 hon nhi-Ct d6 cria ngu6n sring ffing C kh6ng php thuQc vio nhiQt ttQ md chi can ap su6t cria dr.m hoi hay h6p thg th6p D nhiet dQ cria d{m hoi hay h6p thu phni lsn hcrn nhi€t dQ cua ngudn s,ing tring Dit m$t diQn 6p xoay chiAu u = Ugcoscot vdo hai ban cua tU dien C Gqi U ld di€n 5p'hi€u dUng d hai dAu doan m4ch; i, Is, I tan luqt ln gi6 td tuc thoi, gr5 fi clrc d4i vd gi6 tri hi€u dirng cria cuirng dQ CAu 6: ddng di6n m4ch H€ thirc li€n lgc ndo sau d6y dung? e.4*4=r c.4**=r n l4-41=t tJz' "' $*|=r uo 'Io " rz u6 16 4l o "'lu3 CAu 7: Tii5ng dn cua mQt mdy bay c6 mric cutrng d6 6tn Lr = 120d8 Mu6n gidm tii5ng dn toi mirc chlu dugc ldl,2 = 100dB thi m5y bay phii gidm cuong d0 6m: A i000lan B 200lan C 10ltu D 100 Hn CAu 8: Cho m4ch RLC n6i ti6p C = 318FF , R bii5n eOi pien 6p cua m4ch u = UocoslO0nt (V) COng R = R0 = 50Q Cdm khrlng cira cuQn day bang A 60Ct c 1000 D 800 B 40c) CAu 9: MQt 6ne Cu-lit-gio phrit tia X c6 bu6c s6ng ngan *at ta 50 nq n6 tang khA 4eng dAm xuy€n cua tia X, ta tdng dien 6p giira an6t vd catdt th€m 25%.Bulc s6ng ngin nh6t cua tia X 5ng phrit d6 ld A 12,5 nm C 60 nm D 125 nm B 40 nm su6t ti€u thU cua mach dat 916 tr! cr;c dai ,r,M;: Trang 1/5 - Ma d€ thi209 1,4,{f-Ah^, www.VNMATH.com ciu 10: cho mach RLC theo thri t.u mic noi ti6p voi Biiit u = 300 pha so voi u mQt g6c rp ( cos g = 0,8 ) DiQn 6p hiQu dUng URr c6 gi6 hi A 100 v 8.300 v c.400 v Ciu 11 : HiQn A D.200 v tuqng mSt v4ch quang ph6 ph6t x4 trd thinh v4ch tiii quang ph6 hdp thg sring tin sic rinh C str giao thoa anh sring dcm s1r v, flc = 140 v Dong diQn rE d tlao vach quang ptr6 s1r D nhiEu xa 6nh s6ng sic s1r ' h CAu 12: TOc dO cua mQt v{t dao dQng diAu hda qua vi tri c6n beng ld 20cm/s Khi d6ng nlng ning cria vQt beng thi t ld B 10cm/s vQt c6 tdc dQ vi thiS A 10.,6cm/s C 5cm/s Ciu 13: Philt biiiu nio sai n6i vA ap alng mdu Bo vio nguy6n tu hi&o? D l0"Ecmls A Ban kfnh c6c quf d4o dtmg uing ti l€ vai binh phuong cria cdc si5 nguy€n li€n titip B Tr4ng th6i kfch thich c6 nEng lugng cdng cao thi r4ngthdi 116 cang kdm bAn virng C Ndng lugng cria nguy€n tu chi li tlQng nAng cria electron D Tr4ng th6i cs b6n r.rng vdi nguy€n tu & t4ng thii drmg c6 ndng luqng thdp nhdt- Ciu 14: MQt proton (mo ) c6 vfn t5c v bin vdo h4t nhdn ]fi a,-g fut nh6n giiing (m*)voivfntiicc6d0lcmbdng v'vicirnghgrpvdiphuongtoicuaprotonmQtg6c 60".Gii{tricria v' y6n t4o la A v,= fh*v B n'= mp S*Po mx C Y'=Il,v mp [ vt = m-v -!- mx Cdu 15: Phat biCu nio sau rldy kh6ng tlung? A Tia hdng ngo4i vi tia tu ngo4i ddu tiic dqng l€n kinh 6nh B Tia hdng ngo4i vd tia tu ngoai c6 ban ch,5t la s6ng diQn tu C Tia h6ng ngo4i vd tia tu ngo4i dAu c6 tric dgng nhiQt D Tia h6ng ngo4i c6 tAn s6 lon hcn tAn s5 cria tia tu ngoai Ciu 16: Tim phdt bi6u sai Trong m4ch dao rlQng tg LC A C6 sg chuydn h6a qua lai giiia ndng lugng cliQn tnrcrng vi ndng luqng tu trutmg nhmg t6ng cua chfrng duo c bio toan B NXng luqng dign trusng vd ning luorig tu truirng c6 cung gi6 t{ clrc dai C Neng luqng diQn truong vi ning luqng trr trunrng bii5n aOi tuen hoAn theo thoi gian ^^l vsi ten s6 +_ 2rJLC' D Ning lugng diQn truong t{p trung d tC di€q nnng luqng tu trudng t{p trung cuQn cim Ciu 17:DognmachxoaychiAuRLCn5itiiipv6i L=2/r(H); C=31,8FF;Rc6g16tri xdcdinh, i= cos (l 00 nt - n/ 3)(A,) ni6u thric cua ulc la a uNre = ooocos[100.*"t-;)(v) \ c ''s =zoocos[r.o,rt+I)rvi6./t ' \ B uNre = D uv* ooocos(100"t+;)(v) =zoocos(roo"-;)t"l CAu 18: MQt m4ch di$n xoay chiAu khdng ph6n nhrinh gdm: dign t0 thuin R, cuQn ddy thuAn cim L va tu di€n Q Dit vdo hai qlu dogn m4ch hiQu di€n thiS xoay chiAu c6 tin si5 vd hiQu di€n thri hi€u dung kh6ng A6i Otrng vdn kd (von kri nhi€t) c6 diQn kd i.it toq hn tuqt hiQu di€o the d hai deu do4n m3ch, hai dAu tlf di€n vi hai dAu cuQn ddy thi si5 chi cria vdn ki5 tucrng ung ln U, Uc vd U1 gi6t u - Uc = 2UL.He A costt}=,2 s5 cdng su6t cua m4ch rliQn ld B cosq=1 c coss =+ D "orr'2= Trang2/5 - Ma dA thrz}g www.VNMATH.com CAu 19: Hai di€m S1,S2 cdch 16 crn trdn mat mQt ch6t lOng dao dQng voi phuong trinh uq=usr=acoslOOlrt.VantdctruyAns6ngt6nm{tchdtl6ngli0,4mls.Gita51,S2 c6baonhi€u diiSm dao ttgng vdi bi€n rtQ A.39 ciu cpc d4i? c.40 8.41 20: MQt vflt nhd dao dQng diAu hda theo mQt tgc co D.20 ai* ph6t bicu ndo sau tl6y oung? A Qug tl4o chuy6n dQng cria vft ld mQt doanhang B Lgc kdo vd tric dlrng vio vgt kh6ng ctdi C Qu} t14o chuydn dQng cria v4t h mQt clulng hinh sin D Li d0 cria v{t ti lQ v0i thoi gian dao riQng Cdu 21: Tim ph6t bi6u nio sai vA phan rmg nhi€t hach? A t6a ndng luqng nhi6u hcln ndng luong phan rmg phdn h4ch c6 cung mQt lugng nhi€n liQu B ld str ki5t hqp hai hat nhdn nhe thdnh m-Ot h+ nhdn nqng hon vd t6a ndng luqng C phan ung ki5t t6a nhiQt ldm n6ng m6i truong xung quanh n€n ta ggi ld phan trng nfriet hech D Con ngudi d6 thirc hiQn dugc ph6n ung nhi€t hqch kh6ng ki6m so6t dugc d6 li su n6 cria bom H Ciu22: Chom4chn6itiiSpRCc6 uAB=l00cos(l00nt+n/4XV).D6lQchphagrriauvdild n/6 Cuong dd hiqu dUng I = 2A Bitiu th&c cria ddng di€n ld A i=2Jico,(,oo**-#)(^) c i zJl c, (t oo* * B i = zcos(roo*-ff)tel D i =J7.o,(roo*-#)(^) fr)to) Cdu 23: Ddy AB ddi 24 cm cdng ngang, hai dAu A vd B cO Ainb c6 s6ng drmg thi tai M qich ld bgng s6ng th{r 56 bung t€n ddy ld: A B s c.4 D.6 Cda24; Tim ph6t bi6u ndo sai vd lgc A chi ld lpc hrit B 14 cm hat nh&r? B thuQc loer lUc tuong trlc manh C c6 fi s6 lsn hon lgc dAy cul6ng gita c6c proton D ld lgc h6t c6c nucl6n d gdn vd ld lgc &y c6c nucl6n xa Ciu 25: MQt s6ng lan tuy6n dgc theo mQt duong thdng Phucrng tinh dao dQng d ngudn O ld u0 =acosot Mdt diem nim ten phucrng truyAn s6ng crlch xa ngudn mQt phin ba bu6c s6ng d thoi diCm bang mQt nta chu k! c6 d0 dich chuydn h cm Bi€n dQ dao dQng bdng 4.7,7 cm 8.8,5 C.5,8 cm cm D 10 cm C0u 26: Trong thi nghiQm giao thoa vdi hai k*ie Idng c5ch mm, khodng crich tu hai khe d6n 1,8 m Anh s6ng don sic duqc dtrng c6 bu6c s6ng 0,6pm BA rdng vung giao thoa trdn ld cm ld 36 v6n sring thdy dugc tr€n mdn td 4.37 8.3 Cia27z Ph6t bi6u nio sai n6i v6 s6ng co hgc? A S6ng truy€n tong chdt lOng ld s6ng dgc B S6ng tluyAn ch6t kfii li s6ng ngang c.4 D.19 C T6c dQ truyAn s6ng cflng 1A t6c d0 lan truy€n bitin dang cua mdi truong D Trong thgc ti5, cang xa tAm dao dQng bi€n dQ s6ng cing nh6 Cdu 28: MQt mach dao dQng di€n tu li tuong g6m cuQn cnm thunn c6 dQ t.u cim L vd tU diQn c6 tti€n dung C Trong m4ch dang c6 dao dQne di€n tir t.u vd diQn tich clrc chqn B ^fr= )"0 34 GiAn dd Fre-nen nhu Hinh ' Vi Ar:Az ; g: (4,,1r):2n13 * ram gidc OAA1 ddu -+ A : At:6 cm Frnu : mO2A = N -+ chon A o Hinh C6u 35 Theo bdi W6 :W1 -+ * Wo :Wt :W/2 :W 5^ol2-+ v : vn^*l J2: l0.,ll cntls chqn C CAu 36 Tai thoi di6m t = 0, q LW v6i ({) g6c mtt cta vdc to quay dangbM, nl4 (Hinh s) + pha ban dAu cria dao dQng q : -nl4 -> chon B CAu 37 Tdc d0 trung binh cria ch6t di6m I chu kj' : 4AlT: 50cr.n/s -+ chQn B Cdu 38 L[c t = 0, v6c to quuy tr C (Hinh 6) Khi v6t qua vi tri c6 li dO cm lAn thri'nh6t theo chi6u duong, v6c to quay g6c q: 5nl3(Hinh ) Mat khdc c6 CAU 39 Tucrng tric ,p Hinh tr M vd dA qudt duoc = t: ?t T gita c5c hadron goi tucrng 5T16-> Chon D tzic manh (SGK v{t lf i2 co bAn) -> Clron D C6u 40 ! m: m()132 -+ 2T = 32 -+ t_ = T = -+ t = 5T = 1800ft = 75 ngdy -+chqn B C6u 4X Ap dung dinh lu6t b6o toAn d6ng Iucrng P = Pr + P, (Hinh 7) : Vl Pr yt = -L- F2; g6c( F, F, ) =600- tam gi6c OPPr ddu-* F1 : P2 = P -+ ITl.V lx* cholt B Hirrlr C6u 42: Ta c6: H6: 2No= 9"" TU -+ No : 4.51.10r8 hqt *r m6 : img + chqn B CAu 43 Lgc hat nhdn lu6n lu6n ld mQt lr;c lrrit manh vd chi pf ph6t huy pharn -cheu vi kfch thu6'c hat nhAn B Cfrw 44 Cdc ph6t bi6u A, B, D diing (SGK v6t li 12 co bAn tran rang 200; 20D B6t cir mOt ph6n rmg t6a ndng lugng ndo dAu ldm n6ng rn6i trudrrg xung quanh Phin rmg nhi€ hiQt h4ch ld sg k€t hqp hai hat nh6n nhg thdnh ni6t hat nhAn ndng hon D€ c6 duoc pharr irng nhi6t hach rhi cAn ;6n nhi€t dQ hdng trdm tri€u d$ * phSt bi6u C sai chon C - "{5 E4 CAuI - E: : hc/la Es-E.,=hc/) lt -1 t3,6t4 625 -_ 13'6/16+13' -E*-Et ^ )"0 Er-8 -13,6125+13, 13,6 19 256 625 256 Cdu 46 +211 A -4, C6u 47 T' =T CAu 48 Ta c6: www.VNMATH.com = l.0939pnt- chQn D + 0,05f :) \.CD' \O- fr 1,05 l' "" = '' -+ =1.10251 -+ ^l - 0.1025 = 10,25% -+ chQn A lJ l t :1,057 ' -+ / = 42 = corlst +khi gid rri vAn t6c tdngthi dQ lon giat6c cia vdt fiAm - chon C C6u 49 Trong hi6n tuorg cdng hu0ng, hhi lr,rc ma s6t cdng bd th) bi6n d0 dao dQng cdng lon (cQng hucrng nhgn); (tham khio Sg| v{t li 12 co bin trang 20) ttic 6nh s6ng (v = 0,8 c) thi chiAu ddi cria vAt thay d6i Ciu 50 Khi vAt chuy6n d6ng vo'i vdn t6c l2 theo quy luat: L: f-r./f -! !c' "iv6n =30.0,6 = lB cm dQ co chi6u dai Al: 14-L= l2 cm * chqn D "-fp oAP AN CAc MA oC THI THO LAN V MON V :t Li 12010 - 20',11 ... hgp lUc tic dtng l6n vQr ld A.30N CAu 45: Dd chu ki A 10,25yo 8.3N ' C l2N lic don Gng th€m 5% thi nhai tang B 5, 75yo D 15N chiAu ddi n6 th€m C.2,25yo D. 25% CAU 46: Tucmg tdc gitra cdc hadron... = l.0939pnt- chQn D + 0,05f :) .CD' O- fr 1, 05 l' "" = '' -+ =1.10 251 -+ ^l - 0.10 25 = 10, 25% -+ chQn A lJ l t :1, 057 ' -+ / = 42 = corlst +khi gid rri vAn t6c tdngthi dQ lon giat6c cia vdt... ngiy D 50 ngdy Trang 5/ 5 - Me da thi 209 rRrJoNCr'rprEAoDUyrLr f{UsNG nAru www.VNMATH.com crAg pp rHg rrrqf FSI F{sc rAN v (s312tlla) naonq: vag nt rvgA pE: lee Cdu I Khi c6 c6ng hu6ng thi hQ