THI LÝ CHUYÊN NGUYỄN HUỆ HN (2010)

so GrAo Duc -DAc I4\O nr\. LSgt, _" TrilT-gtlo6l FIQ^C LA.NTqItt -WANA ZO1O TRIIONGnff CHUyEttNCUyeNHUE,,:,t1;i:rY''r7,',1L1- MON Vdf t Y .r"'l)(' {?di gian ldm bdi: 90 phtu; Me di thi 485 ir<',/l:l'1lFi'',r'li'i '1"'itl'ii\';r.,bp cdu trdc nghiQm) /_.i. _,_qa.,jii \'t i I. rIIAN CHUNG cno rAr ci Cacirf 5-INH ( 40;;- tii cAu 1 rli5n cau 40) Cdu 1: Anh sdng kh6ng c6 tinh chAt sau: A. C6 vdn t6c Im vd h4n. C, C6 the truydn tong mdi truoirg vit chAt. B. C6 truyAn trong chAn khdng. D. C6 mang theo ndng luq'ng. C. 1,41 (s) D.4 (s) B; At = 2,75 (s) D. At = 2,25 (s) 0.+1,+2 ). Bi€n dQ dao dQng tai M det cuc dai khi : A. Ag = (2k+1)nl2; B, Atg = 2kn; C. d2-d,= 11 D. Aq : (2k+l)n; I Cdu 8: Trong cdc dung c9 ti0u thu dign nhu quat, tri lgnh, d6ng co, nguoi ta phii n6ng cao hQ s6 c.Ong suAt nhim A. gi6m c6ng suSt ti0u thy. B. tdng c6ng su6t toi nhrQt. C. giim cuong dd ddng diQn. D. tdng cucn-rg d6 ddng diQn. , ^ ^,.,1. t. , Cdu 9t Chi3t sudt cua nudc d6i voi 6nh s6ng mdu lam ld n1=1,3371 vd chi0t sudt ti d6i cia thuy tinh ddi vsi nrdc ld n21=1.13?90. Cho v6.n tdc truyAn 6nh sdng lam trong kh6ng khi l,i c = 300000 kmis. Vdn t6c ctra 5nh s6ng mdu lam troiig thui tinh la: .q t,9?.108m4. B. 3,52.108 mls C.2,56.108m/s. D.2,24.108 mls CAu 10: Cucmg dQ ddng di6n ludn.1u6n tr6 pha hcrn hi€u ditn th6 o hai dAu doan mach khi A. doan mach c6 I- vd C mac ndi ti€p. B. dcan mach chi c6 tu C; C.co4nmpchc6RvdCmi.noiti5p.D.doarrmachc6RvALmicnoitiep. Trang 1/6 - Ma dA thi 485 CAu 2: Kli s6ng dimg xuAt hiQn tr0n mQt soi dAy ddn h6i, dao dQng cira c6c phin tir vat chAt trong kho6ng hai diAm niit gAn nhau nhat sC dao dQng : A. nguoc pha B, wdng pha C. lQch nha nhau f, D. cr)ng pha CAu 3: Trong mach diQn xoay chiAu, s6 chi cria vgn k6 cho bitit gi6rii ndo cfia hiQu diqn thC? Mgt v6n k6 mic vdo hai dAu tg rliQn trong doan m4ch xoay ohi6u, chi s6 cria v6n k6 le U. Khi d6 thUc sU tp diQn phdi chiu mQt hieu dien tire iOl Aa ld bao nhi6u? Hdy chgn ddp 6n EL|NG trong c6c k6t quA duoi dAy: A. Von k0 cho bi6t gid tri tuc thoi. Hieu diQn thii tdi da mA tu diqn phdi chiu ld Uo = U Jl B. V0rr k6 chc bi6t ele fi higu dpng. HiQu di€n the t6i da md tu dienphai chiu li uo = g7u5 . C. Von k€ cho bi€t gra ti hiqu dr,rng. Higu diqn th,itdi.da mi tp diQn phdi chlu ldUo; U!e . D. Vdn ki5 cho bicigi6 trl bi6n d0. Hiqu diqn thO ti5i da mA tu diqn phdi chlu ld U. CAu 4: N6i vA dic di6m cria tia tft ngoai, chon c6u phdt bi€u sai Tia tu ngo4i' A. trong suOt OOi voi thu! tinh, nudc. B, bi hap thp bdi tdng 6zdn ciia khi quy0n Tr6i DAt C. ldm ph6t quang mQt Sd chdt. D. Idm ion hod kh6ng khi' CAu 5: 0 cung mQt noi, con lic dmi mQt c6 chiAu ddi l1 dao d6ng voi chu ky Tr = 2,828 (s) thi con lic don hai c6 I chiAu ddi lz= '* dao ddng voi chu lcy ld: )- A.5,656 (s) , 8.2 G) CAu 6: Tr0n hinh vd dumg ndt liAn iA gi6n dO 1 ''I song tgi mQt thoi di0m, ndt di?t le hinh d4ng s6ng . ., I I vio thoi di€m sau d6 At gi6y. S6ng lan truyOn theo chidu dumg cta truc Ox vo{ tdc dg 4-q1s Gi6 tri At nio duoi ddy khOng th6a min diAu kign cfiabii to6n : A. At = i,75 (s) C. At = 0.75 (s) CAu 7: Trong qu6 trinh giao thoa s6ng, dao dQng tdng hry t4i M chinl ld sg tiSng hqp cric s6ng thdnh pnan. Cgi Atp ld d0 igch pha cria hai s6ng thdnh phdn t4i N4, dz, dr 1A khoArig cSch tir M di5n hai ngudn s6ng. {Voi k = Flinh d4ng sSng CAu 11: Ktri mQt vat hAp thu.6nh s6ng phdt ra tt mQt ngu6n,-thi.{iAi Ag.ct1,v,it, . A. Bing nhigt dO cira ngud'. . C6 thC c6 gi6 tribAt kt C. TirAi hcmnhiet dO cira ngudn. D. Cao hon nhigt dQ ngu6n. cau 12: MQt s6ng co hgc lan truyan ftong mQt m6i truong v?t chat tai mot ditlm cdch ngudn x (m) c6 phuong trinh s6ng ,, = 4"os(* t -Ti(cm). Van t6c truy}n s6ng trong mdi truoirg d6 c6 gi6 tri: A.2mls ' i. ,t, c. o,5m/s D' 5 m/s' CAu 13: Trong thi nghiQm cta Young, khoang c6ch gifa hai khe SrSz d6n mdn ld 2m' Ngudn S ph6t ra rinh sang il#i jt, .6"n OS,ifrri khe m6t Uro-ang o,Sm. Niiu doi S theo phuong'vuding gdc vd SrSz mOt do4n lmm thi v6n sang trung tdm s0 dich chuy6n mQt doan ld bao nhi6u tr6n mAn ? A. 6mm. t. Kh6ng dich chuy6n' C' 4mm' D' 5mm' CAu 14: X6c dinh dao dQng t6";;;;= " *"r**, ctra ba dao dQng diAu hda cr)ng phuong cung tin s6 sau : xr = 4.cos(30t) (cm) x,: -4'sin(30t) , t= 4J2.cos(30, - X) (cm)' vlrvdl A. x=8.cos(30t)(cm) 4.Jacos(3ot +;) (cm) c. x=+.cos(3ot-f) Cdu 15: Nguyen tic cia mach chgn s6ng trong m6y thu tlanh.dya tr6n hign hrgng: A. Giaolhoa s6ng. B. CQng huong diQn. C. NhiEu x4 s6ng. D. S6rrg dtmg. C6u 16: Am thanh do nguoi hay mQt nhaq cu ph6t ra c6 d6 thi dugc bidu di6n theo thoi gian c6 d4ng: A. Duong cong bAt ki B'Eu,*9 hinh sin' c. Duong do thi him cosin. D. Bi€n thi6n tuan hoan. Ciu I7 :Vigc tao ra ddng diQn xg-ay, cli-Arr-3. pha-c6 uu di6m nio trong s6 cAc dlc diAm sau hon hin ddng l xoay - B. Khdng cry bO g6p khi ch6 t4o m6y phdt dign. D. M6y c6 c6u t4o don giin. cffu 18: Mgt con 16c ld xo theng drmg c6 v4t n4ng khoi luqng m = 0,5kg, ld xo c6 dQ cung k = 0,5N/cm, dang dao dQng d6u hod. Khi vin t6c crta vat Ie 20cm/s ihi giu tdc cria n6 bing zJi n ts2.NEng luqng dao dQng cria hQli: A.3j B.40mJ C'0,04mJ 'D'0'16J Ciu 19: Chgn ph6t biiiu saikhi n6i vA S-Ctt"tutru-dng' A. DiQn truong vd tri truong le hai mAt thC hien fhe" nhuu cria mQt lopi truong {W. {.{Soi ld diQn tu trumg' B. Tri truong trong nam ch6m vinh cuu ld mot truong hgp ngo4i l0 ta chi quan s6t thay hr truong C. Kh6ng thti c6 diqn truong vd tir truong tdn tai dQc l4p D. Diqn **g birin thi6n * ttt t**g xo6y vd nguo. c lai tt truong bi€n thi€n sinh ra diQn trumrg xo6y' Ciu 20: Khi truyAn t6i mQr c6ng sudt diQn p tir noi sin xuAt diln noi ti€u thu, dii gidm hao phi tron ducrng ddy do tod nhiet thuc t6 nguoi ta tiiln hanh ldm nhu thO,ndo ? . ! 1" pilfaau .f;u nfra mAy diQn rrr6y tdng thil vd d noi ti6u thq m6y ha thii. g. ;il O aar r" .,t. "f1d m6y diQn may ha tfr6 va dat o noi tieu ti,u m6y h4 thiS hoAc teng th6 tuy vdo nhu cAu '*el8nlt^Iult d diu ra cua nhi m6y dign m6yrdng th6, diQ' tren duong ddy cluoc sri deng tr,uc tii5p mi kh6ng ). , ,.A., 1 can may Dlen ule. D. DAt o ddu cria nhi m6y di6n m6y rdng thii ve d{t d noi ti€u thg m6y ha thli hoAc tdng thii ruy vdo nhu ciu trmg dla phuong. CAuZlt Trong dao dQng diau hda cia con lic don, ph6t bi6u riAo sau dAy ld dring? A. Luc k6o vd phu thudc vdo khdi luong cia vqtn{ng' B. Luc kdo vA pttp tt.tug. vdo chidu {di cua con-ldc' C. TAn s6 g6c cira vft phr,r thudc vdo.kh6i'luqng cira vdt' D. Gia ti5c cria v{t phir thuQc vio kh6i luqng cta v at' .J2cos(301) (cm) , .l ctueu I pna: A. Titlt kiQm duong ddy trong khi tai dien. C. Tao duoc tt truong quaY. ATI{ANH TO COSOI frangZ/6- Ma dC thi 485 CAu 22: Trong thi nghiQm giao thoa 6nh s6ng dung hai khe Ygung, hai kn9 dug_c chiiSu bing dnh sang c6 budc s6ng l" = 0,5pm, bi6t SrSz = a = 0,5mm, khoAng cdch tu mqt phdng chria hai \he d{ mAn quan srit ld D = 1m. Tai vitri M c6ch vdn trung tdm mQt khoeng x = 3,5mm, c6 vAn s6ng h,a: vdn t6i, bfe mdy? A. Vdn s6ng bAc 3. B, Ven t6i bOc 4. C. Ven l.f.ibdc2. D. Van sdng bAc 4. Ciu 23: Cho mpch dien nhu hinh vE bOn, L thuAn : cdm. Dtng v6n k6 nhiet lf tudng do hiQu dipn thiS ta dugc i UeM = 75 V; Ur's=100/3 ff);. Bi6t rlng hiQu diQn th6 uap vuOng pha voi urun. Tinh hiQu disn th6 hi€u dung gifia M, N : Uv]i; A. Urnr = 75 (V); B.Ur,or = 55 (V); Cbta24: Trong mQt thi nghiQm vd giao thoa 6nh sang. Hai khe I-6ng cdch nhau 3 mm, hinh inh giao thoa duoc hung irdn marianl c6ch i'ai khe 3m. Sr,t dpng rihh sang tring c6 budc s6ng fil 0,40 Pin dtin 0,75 pm. Tr0n man quaisdt thu duoc cke dhiquang ph6. B0 rQng cria dei quang phti ngay s6t v4ch sdng tring trung t6m [i A. 0,50 mm. B.0,35 mm. '' C.0,45 mm. D. 0'55 mm. CAu 25: Tai hai di6m A,B trdn m{t nu6c nguoi ta thUc hiqn hai dao dQng k6t hqp cilng biOn dQ 2mm, cirng tAn s6 20Hz vit ciing pha. V|n t6c truyen s6ng tr6n mdt nu6c 2mis. Coi trong qu6 trinh lan tryf An s6ng trOn mgt nudc bi0n d9 dao dQng khdng giim.Dao dQng tgi M c6ch A 28cm, c6ch B 38 cm c6 biOn d$ bdng : A.0; B.4cm. C.2mm; D.4mm; Ciu 26: OO tiri UiCu di6n sr; bjtin thi0n cria binh phuong v?n t6c theo li dQ trong dao dgng diOu hpd c6 hinh dang nio sau ddy: A. Duong elip:- , C. Duong trbn. : Cd:u 27: Cho m4ch diQn xoaY ghi6u nhu lo xo ld: A.6N/m B. Mgt phdn dusngiypecbol. D. M$t phAn duong parabol. B. 30 N/m C.40N/m D. 50 N/m hinh vE b0n. . CuQn ddy c6 r = 10 O , L ::-*^(lI) oat vdo hai dAu doan m4ch mQt hiqu di€n thd dao dQng di6u hod c6 gid td hieu dung ld U=50V vA tdn si5 f = 50H2. Khi diQn dung cta tu die.n c6 ei6 tri le Cr thi s6 chi cria ampe ki5 ld cgc dpi vd beng 1A. Gi6 tri cria R vA Cr li A.R=5oo vif,:ftgl B.R=40o viC:$tFl t tn_z vi c : {(o) C.R=50OvdC:?(F) D.R=40O iE CAu28: Chom4chdiennhuhinhvd: uoe =200cos(100nt)(V) L R c R = 100 9, C = 15,9pF, cuQn ddy thuAn iAm c6 dQ tr; cdm L thay d6i A */-9tdhrffi l* B duoc. Bi6t cdng su6t ti€u thq cria m4ch ld 100W vd cuong dQ ddng diQn trong m4ch s6m pha so voi hiQu diqn th0 gita hai dAu mach. Gi6 tri L, cria cuQn cdm vd bi6u thric cuong d9 ddng diQn qua mach dugc x6c dinh: 7,- A. L, = 11H);i = .E.cos(l00rct + |Xnt B. L, = iCHi,i = .,D.cos(l00rut + flfal c. L, = i6t;;i = l.cos(l00 nr'|)(A) D. L, : ]e1,, = .,,6cos(i00nt - fXal Cdu 29: MQt vat m = 1,6 kg dao dQng diiu hda voi phuong trinh : x = 4cos(rot +|) @m) LAy. g6c tqa d0 t4i vi tri cdn bing. Trong khoing thoi gian d30 (s) dAu ti€n te tu ttroi di6m to= 0, vat di dugc 2 cm. DQ cimg cria CAu 30: MQt mech dao dQng diQn hr g6m mQt cudn ddy thuin cdm c6 d0 t.u cdm L vi hai tp diQn Cr vd Cz. Khi mfc cuQn d6y ri€ng voi tung tU thi chu ki dao d6ng cia mach tuong ung ld Tr=3rns vh T2= 4ms. Chu ki dao d6ng c'ia mach khi m6c d6ng thoi hai tq song song voi cu6n dAy ld: D.5ms Trang3l6 - Ma dc thi 485 A.2,4 ms. B. lOms C.7ms l Cffu 3i: M6i mach dao dgng gdm mQt t9 4200pF vd mQt cuQn cdm c6 d0 tU cdm 275mH, dign trd thuAn 0,5O. H6i phdi .ung .ip cho mpcliniQt c6ng suAt bao nhi6u dC duy tri dao dQng cira n6 voi hiqu dign thti cuc d4i tr6n [t ld 6v. A. P=2,15mW; B. P=2'75pW; C. P= 137 pW' D. P:1,37mW; CAu 32: M6r mach dao ddng LC c6 cuQnthuAn cdm c6 dQ tr; cdm L= 10r/n (H) vd tU diQn c6 dipn dung C=l/n (nI). Bu6c s6ng diQn tir md mach d6 c6 th€ ph6t ra thu6c dAi s6ng nio trong thang s6ng v6 tuydn : A. S6ng trung. B. S6ng ngnn. C. SOng Oai' D. S6ng cgc ngin. Ciu 33: Cat6t ctra t6 bdo quang diqn dugc phri mQt lcp C6xi c6 c6ng tho6t electron ld 2eV. Cat6t dugc chi6u srlng boi chum rinh s6ng don sic c6 bu6c s6ng 0,5pm. Dung mAn ch6n t6ch mQt chtm hgp c6c electron quang didn vd huorg n6 vio ttr truong d€u c6 E vu6ng g6c voi %-', B = 4.10-5T. Choh=6,625.10-3al.s, c=3.i08m/s, e=I,6.10-leC, m.:9,1.10-3lkg.Ban kinh qui d4o c6c electron ditrong tir truong ld: A.5,87cm B. 0,59 cm C.2,86cm D.3,06cm Cdu 34: Cho mach diQn nhu hinh v6 (H.l4).Biet : R= 80O; ) r = 20O; L : aH. Tu C c6 diQn dung bi€n d6i dugc. HiQu l\ diqn thC ues:120"'8 cosl0Ont (V). Eien dung C phni nhan gi6 tri bao nhi6u dd c6ng su6t trOn m4ch d4t cuc tlai. Cdng suAt tieu thp irong m4ch hic d6 ld bao nhi6uf Hiy chgn k6t qud d0ng trong c6c k6t qui dudi ddy? A. c:+q F ; p-"* =i64 z1\ foP\ *l t i P-"* =144 w. c.c:to r,, -8 max zTt R L,r C- tn (H.14) F iP-"* =120 W. CAu 35: Dao dQng diQn tu ndo duoi d6y xdy ra trong mQt m4ch dao dQng c6 th6 c6 ndng luErg giim din theo thoi gian: A. Dao dQng cudng bric. B. CQng huong dao dQng. C. Dao dQng riOng. D. Dao dQng duy tri. C6u 36: MQt mach digi g6m mQt tU diQn C, mQt cu6n cam L thudn c , R'z cim khang vi mQt, bi6n trd R dugc mic nOi tiep. ?at vdo hai ddu A F l"F^b-ft-t a mach dipn m0t.hieu dien thti xoay chiAu u= ,l20Jicos120nt (V) (8.1e) (xem H.19). Bitit ring rmg voi hai gi|tri cfia bi€n trd : Rr = i 8 0 vd .& = 320 thi cdng suAt ti6u thu P tr6n do4n mach li nhu nhau. COng su6t P ctiu do4n m4ch n6i tr€n kh6ng th6 nhan gi6 tri nAo trong c6c gi6 tri sau? A.P=72W B. P = 288W C. P= 144W D. P = 576W C6u 37: MQt v{t c6 khdi lugng m = 1008 dao dQng didu hod c6 chu ki ls. Vgn t6c cta vpt qua vitri cAn bing ld ve = 31,4 cnls.Llry x2= l}.Lr,rc hOi phuc cuc daiticdung vdo vflt ld: A. O,2N B.4N c.2N D.4N CAu 38: Trong gia dinh, ftic dang nghe dAi, n6u d-6ng hoqc ngat Aign (cho ddn i5ng ching h4n) ta thucrng nghe thAy ti6ng "xet" trong ddi. Hdy chon c6u gidi thich dring trong ntrirng c6u gi6i thich sau: A. Do khi b4t c6ng tic diQn, ddng di6n m4ch ngodi t6c ddng. B. Do khi bgt cdng tic diQn, diQn trd trong mach gidm dQt ngQt. C. Do khi bAt cOng iic diQn ddng diQn qua radi6 thay ddi dQt ngQt. D. Do khi b4t c6ng tic diQn, xu6t hi6n rnQt "xung s6ng". Xung s6ng ndy t6c dQng vdo 6n$en cira miiy thu t4o n6n ti€ng xgt trong m6y. Cdu39:Ph6tbi0undosauddyvAdaodQngcu0ngbftcvdh€tudaodQngldkh6ngiIring? A. Chu ki cria hQ tg dao dQng ludn bdng chu ki cria dao dQng ri6ng cta h6. l. llC" dQ dao_dQng.cria hQ tg dao dQng.kir6ng php.thuQc vis bi6n d.Q cria h4ct6'c dung l6n h€. C. Tdn s6 cira dao dQng cuOng btc ludn bdng tdn sg cria dao dQng ri6ng cira hg. D. TAn s6 cria dao dQng cuOng birc bing tAn s6 cira-h;c cuOng birc. C6u 40: Chitiu bfc x4 c6 bu6c s6ng [ = 0,4pm vdo catot cria m6t.t6 bdo quang diQn. Cdng thoiit electron cta kim 1o4i lim catot ld A = 2eV. Tim gia trt hiQu diQn th€ ddt vAo hai dAu anot vA catot Ce trigt ti6u ddng quang Trang 4/6 - Ma de thi 485 di€n. Cho h= 6,625.10 iaJs va c - 3.108m/s. leV = i.6.10-reJ A.Uer<<- l,iv. B.Ur.< 1,1V. C.Uex < - 1,2V D.Uex<-1,4V. lI. PHAN RInnC 1 10 c6u) Thi sinh chi dugc le* I frong 2 phan ( phin A hoEc phan B). A. Theo chuung trinh chu6n ( r* c6u 41 d6; cf;u 50) , ' ' : - '- cau 4l: ir46t con l6c don c6 khoi luqng 2-009 dugc kdo lQch khdi vi trf c6n bing mQt g6c 600 rdi bu6ng nhe. cho g=lOml{,fUc cdng cyc rlai vd cpc ti€u"cfra,"A,i aa},tu, A.3,5N;0,5N B,4N; tN C.3N; lN .D.5N; t,5N l CAu 42 Mdt rnach di6n xoay chiAu kh6ng phan nh6nh gdm: diQn,trd thuAn R, cuQn dAy thudn c6m L vi g diQn f;Pjj ).T"tll i**i" mqch hiQu aien iirt 'ouy .r'ie,i.J tan'so 'a nicu dle1.' ,i6 ;tr'" ';il d;; aar.bi;e :!.1 Lu^f":: u: nhiQt) cir diQn trd rdt l6n, lin tufr oo hiQu diQn.thti d hai d6u doan mach, hai d6u tu diQn vd hai dau cu6n day thi s6 chi cria v6n kd hroirg ulg id u, uc, uL. Bict u = uc= z.ur.'He ,b .i;il;Jr;;;il; ld : A. c.osp = 1 4,8,27eY B. 13,12eV, C.5,00eV cau 45:-IvloJ^v4t phdt ra tia hdng ngoai 'ao m6i trucmg xung quanh phdi c6 nhiet do B. cosd2 = 1 '2 t; 1iJ L, CoSgl = - z D. "or$,=& CAU 43: MQt sqi ddy AB dai 100 cm c6 diu gco ainh dAua dao dQng di6u hod voi tin so 40 Hz. V4n t6c truydn s6ng trdn d6y Ii v =20mJs. SO OiCm nfit vd s6,li6m b,,rng s6ng tr6n Oaita Uuo *C" ff.frGf,e^i, n). A.4 bung,5nrit. B.4bung,3 nrit. C.51png,4nrit. D.2 b[ng,3 ntt. Ciu 44: Cdc mric nlng lqgirg trong 4giy0n tt Hydr6 duoc xac dfnh theo c6ng thl?, :/ = -E{ry 6 = 1,2,3' ).Nguydn tri Hydr0 dalg d trang ]h6i cs bdn khi b! kich thich s6 h6p thlr ph6t6n c6 nring rodg,Ud"g , D. i2,75eY ndo drrsi ddy lA phucng trinh dao dQng cria vgt : a- a.r= 6"s{tT, *il ,.*= Oror?, g. *= 4in1?!, n |l g.'*= 6sirt?Lt C6u 4?: Hdy chgn ph6t biOu dring rrong sO nhnng ph6t bi6u sau : A. Dao ddng cria con l6c ld xo duoi t6c dung cria ngogi luc tuAn hoan goi ld sg qu dao d6ng, . .B' Dao dQng tu do 1d dao ri6ng c6 chu ki chi phu thuQc vdo c6c ddc tiJ cria n'e mong prrpirruO. vdo c6c y6u t6 b€n ngodi. !. chu trci dao dQng la khodngrhoi gian ngln ,,llAt ma vi tri cria vgt lap iai nhu cff. D. chu ki ri6ng cia ccn lic ld xo rj l€ thu6n voi kh6i lucmg cria vat rang. CAu 48: Gio'i han quang dign cria cdc kim lo?i nhu b4c, ddng, kcT, nh6m nim trong lr:ng birc xg nALo ? A. CA ba rung btc xa d6 n,5i. g.l.iah6ng ngoAi. C. Tia hr ngoai. D. Axh sang rtin tti6y. -Ciu 49: Dung dfch Fluor6xdin h6p thp 6nh s6ng c6 budc s6ng 0,49pm va phat ra dnh sang c6 bu6c s6ng 0,52pm. nguoi ta gqi hiQu sudt.cria. sr,r phrit quang le ti s6. gita nang-tuqng it*.1*s.nrr.Lluani "a nang lffi rinhsdnghdpthir.Bitithi-€usu6tcriasirph6i.?ri:,gcriadringdichiluorex€inliti5%.H6i ris6(tinh raph6n trem) 9ya ph6t6n phrir quang vA s6 ph6 t6n chi.iu d6n dung dich Ie : A. 66,g% B. 7 9,6% c . g2,7% D. 7 5,0% C6'u 46: D6 thi li dd c,ria mQt v4t cho o hinh-vd b6n, phuong-uint '- * CAu 50: Mic mdt ddn n6on vdo ngudn di€n xoay chidu cd hiQu diQn th6 Ia u =22a Ji sin(l00zrt)V. Edn chi ph6t s6ng khi hi0u di6n rhe dat vdo ddn thoi mdn he thric Uu >- 220f! ^lz V. KhoAng thoi gianddns6ng trong I chu kj A. tren 0oc. C, trdn 1000C. id: A. At=.i-s 200 1 B. At= 300 B, tr€n Ood D. cao hon nhiQt dQ m6i 1 C.At= 1s i50 I D.At= - s 100 :' Trang516 - Me dd thi 485 B. Theo chuolg trinh nfrng cao (tir c6u 51 cl6n cAu 60): C6u 51: HiQu diQn thii gifta an6t vd cat6t cria 6ng Ronghen le 3'i04V' Cho diQn tich electron 1,6.10-reC; hing s6,**ifrlr0'3aJs, uan to, cfia 6nh s6ng trong chAn kh6ng 3'108m/s' Bu6c s6ng nh6 "t'lirflf,liaRonehen onff!ii, ,o"n, c. 2,25.i0''m D.4,r4.10'rrm c'u 52: c6ng cin trrict aa t6ch mQt electron ra kh6i mot kim roai rdm cat6t cfia mot tii bdo quang diQn ld2,'76eY ' N6u chi6u l6n b0 m*t catdt niy mQt birc -? te fiu"i6;iJ:.di:fg li 4'14ev thi ddng quang diQn triet ti.u khi aat uao gifra aniit vi cat6t cua ttl bdo quang diQn mOt htqu 6rqn the la fi - ) 42\ A. - 1,83V B 2,i4V - c' - 1',38v D'-2',42y t CAu 53: MQt vat rin quay .fta* aA" dAu quanh mpt trUc 9q qi"h 1uy0n qua v41 T+i mOt di6m x6c dinh tr6n v6t c6ch t4rc quay mQt n o*g, f O tni dai luqng ndo sau dAy-kh6ngphgthudc r ? A.Vantdcddi. B.Giat6crto*gii*. - b'CiuiOttieptuycn' D'Vinti5cg6c' Cdu 54: MQr con lic dori gdm mQt qua 949 *O Ue."g kim.lo4i :".$6i1"*g 10g' diqn tic!-q = 2'10 7 C treo vio sqr ddy mAnh c6ch diQn khdng dan c6 khoi lun"e-ff9"-e a^"g, fte lCiu tOt qgng til*gg =-10m/s2)' Khi kh6ng c6 diQn rrumrg chu k! d.g ;6.tgiltcfta con fi, fair. Daico.n le" u*11ong dib""truhg cl;u E = 104V/m c6 phuong iil"e J*g rto*g *6og' ii" rl a39 dQng nh6 cta con l6c trong diQn truoirg ld A. 1,01s B' 0'99s C' 1'98s D' l'25s cau 55: C6ng tho6t cria electron aoi voi mot kim lo4i li 2,3-eV' H6y-cho biet n6u chi6u ldn b0 mat kim lopi niy lan luqt hai birc "a 'o ioo' 'o"g li l'1 = 0/5i'm ;ti' = ri'sor'*' fay cho uiiit utrc x4 ndo cd khd ndng g6'y ra ftign to*g quang diQn AOi vOi kim lo4i niy? e ^ L:a- r *^ A. chi c6 birc "u .o ilot totg l'z ia conra ning gay ra hiQn tugng quang diQn' ' g. Ca hui birc x4 tr€n ddu c6 th6 gay ra hiQn tugng quang diQn' c' chi c6 birc "a tfi;; song ii6 c6 khd ndng gay ra hign tuqng quang diQn' U. Ca nui birc x4 tren deu kh6ng the gay ra hiQn tuqng quang diQn' CAu 56: MQt tra dflc c6 th6 quay xung.guanh trUc AO1 xung di g: 1e,rn vd vu6ng g6c voi mat pheng dia' Dia chiu t5c dung cfia m6t m6men h;c kh6ng d6i M = oN,n. Suu ris tc'tu rirc dTa bit dIu quay v6n t5c g6c cia ilald}A rad/s. M6men quan tinh cua ffa ld 2 n n r< r, 2 '"-i;,ffi;;-' ,*'"'"* - i' i,so t*' c' 9'60 kgm2 D' 0'2s kd* CAu 5?: Xet he thdng nhu hinh v6: Rdng recld met "e$ ffi; tlqi ftatg m' b6n T kinh R. Hai v{t "ang i,k*ifo*-g M6, Mel KlOi tuqng tdng cQng 14=14o+Ms*m = ffi il;:ftt van tbttttu rtO v4t ld2m/s thi dQng ndng cta hQ vit ld : Fq A.3,75kgm-D'l,rultBruv")vv"D '-@ r 5?: Xdt hQ thdng nhu hi; ue ni"g l9:].t,*ot vinh trdn Uiqi ]rione m' b6n -T r R. Hai vdt ndng kh6i luqng Me, Ms' KI6i luomg tdng cOng N4=\4o*\ils*m = & . ffri "- tbttttu ftO v4t ld2m/s thi dQng ndng cta h0 v0t ld Fq tit 3.ii ffi,ara lffirr*,l'ro-d*" a- | cq, st1 l- Cdu 58: Tinh chAt nio sau dAy kh6ng-phf,i cria tia X: , - ^ *:^- n. io" iJ" kh6ng khi. B' GAy ra hiQn tusng quang diQn' C. Xuy6n qua c6c tAm chi diy cd cm' D' Tinh d0m xuydn m4nh' cau 59: Mor banh ". ;;; q-u6n tinh eoi voi tryc quay c6 ei*t li i2kgm2 quav ddu voi t6c dQ 30vdng/phirt' DQng ndng ctra b6nh xe ld: ^ n - i o^ nr rl F. = ??r A.Ea= 5g,20J B.Ea= liL,ZZl C'Ea=180'0J D'Ea=236'81 cfiu 60: Mot xe lua ch4y voi t5c do 6q kq/h rr€n duhng qu6c lQ song scng vd s6t cenh duong tdu c6 I 6t6 ch4y ilil ;rA":il;#; 120 km/h. TAn s6 tie"e 'ol * ittu.ao,neul ieoi tiong. xe 6to nghe th6v ld fr khi hai xe tirin lai gdn nhau, ra r, #rrri ti6n ,u *u"nr,r"l Hay finh ti s6 i = trrcr;cho tdc dQ truy.n dm trong kh6ng khi ld 340 mA (D5p s6 fay OCn + s6 sau dAu phAy) n - - r r - A. x= 0,9928; B . x= A,744'7; C" x: 1'3429; D' x = 1'1715; Trang6/6 - Me dA thi 485 LID'T' llL I TRUONG THPT CHUYEN , NGUYEN HUE HA EONC HA NOI - Me da rhi r32 THI T'i{u'D,a."I Hqc r AN TF{IJ ri nAnry F{qc 2009_2010 nnOx rHI: vAr Ly 7'hd'i gian ldnt bdi; 90 phtir (Hoc sinlt cht' duqc lim 50 cdu trong 60 cau trdc nghi€nt) B. No = 2.l08ngLry€n tu; D. No = l6.l 0snguy€n tri PHAN I <Phin chung cho c,ric thi sinh tir cLu I ddn cLi 40> cAu l: Trong c6c thf nghi6m sau ddy, thi nghidrn ndo c6 th€ do bu'o.c sone dnh sdns ? A. Thinghi€m trin sic dnh shng cuaNiuto'n. B. Thi nghi€m gio"tf.'Ju uJi [n rang. c. ThI nghi€m tdng hqp dnh s6ng tring. D. Thi ngt,lgr "]c ann s6ng don ,ir. "- cf;u 2: .Khi mdt chirm siing don sic truydn til lchdng khf vao thriy tinh thi: 1 I?r sd tang, bu6'c s6ng giarn. a. lin .o t n5ng doi, uu.o.c song gidm. ,c. TAn s6 giarn, bu6'c song gidm. D. Tin s6 kh6ng d6i, bu.6.c son! tang. Ciu 3: Trong thi nghi€m giao thoa IAng trong khong khi, khodng cdch gifr'a hai khe ld a, khodng cAch $.2 l(he t6'i rndn ld D' x ld toa do cua mot.didrn M tr€n mdLn so v6'i v6n trung tAm. Hi6u quang h-inh crja hai s6ng rinh s6ng d6n M ciuoc xac dinh binc bieu thfr.c njo? A.dz-dr =2axlD B.dl-d1 =axlD C.dz - dt = ax/2D D. d: - d, : aDlx Ciu 4: Trong thf nghi6m IAng ndng lu.o-ng 6nh s6ng: A' Van du'o-c bao toan, nhu'ng duo-c phan pnoi tai, phAn bdt o'chd van t6i du.o-c chuy6n sang cho vdn siing. li 5l]9',g duo-c bdo todn vi ch5 vAn toi vA. ch5 vdn siing cong lai thrinh b6ngt6i. Cl Kh6ng duoc bdo todn vi ch5 ciic vdn t6i mEt pnin ndng luong iinh s6ng u"1 ,dt do nhi6Lr xa. D. Khdng drlo-c bio toin, vi vAn.sdng lai nhidu hon so voitni ktiong co giao'ttroa CAu 5: OOi vOi doan mach di€n rnic th-eo so do o.hinh R. L.r v0 thi cong thri'c ndo du'o'i d6y ld dring: ,f*-a-aT; *i$li$trftff:1,.1'!-l l- -= j\ rl ts A. Cdng sudt tiOu thu trung binh o 6ng dAy di€n tro. ld p, = U irN . r B. Cdng suAt ti€u thu trung binh o.todn b0 doan mach pn: p = Ulr! C. C6ng sLrdt tidu thr] rrung binh o rLr di€n p.= 2n.f.C. Ui,r . R + r D. Cong su6t tieu rhu rrung binh o.di€n tro le pR: -qit R ciu 6: Trong rn6t ngu6n ph6ng *a i3P c6 108 nguy€n ru'v6.i chu ki bdn r5 T: l4 ngdy. B6n tuan 16 rru6.c d6 sd rrguy€n rri' i1P rrong ngu6n do bing bao nhi6u? A. Nn :2,5.i OTnguydn tu'. C. Nn = 4.l0snguy€n tLr clu 7: t{at nhan t;juo,l'ng ydn phan rd theo phu'orrg trinh 2lf Ll -+cr +2x.Bi6t o6ng nrng cria hat nhdn con ')x ta:,4'10-2Mev, d6ng ndng cia hat o ld (ldy khdi lLrong ciic har nhdn rheo don vi u bing kh6i s6 cira chIng) A.2,22MeY B.0,B9MeV C. 4,42Mey D.7,2.10-2MeV tlll ilr[!',ffL'.ll:?tuo' ns giao thoa s6ng nu'6'c vo'i hai ngudn k.it hop "**n" on, slvir 52, nhfrng di6m nim A' Dao d6ng v6'i bi€n d6 bd nhdt. B. E[.pg y€n, kh6ng dao d6ng. c' Dao ddng vo'i bi6n dd l6'n nhat' o. nao-oong v6'i bi€n do c6 g,iri rri r*rng binh. cf;u 9: Lang l<inh thdrv tinh g6c chi6t qTlgj - 50 1dLro.'c.ri ra ,rho ;; .i!,1u, vo.i dnh siing do vd dnh sdrrg tim lin lL'ot ld n6: 1,643 vitn, = t'b8s. cho'dr.r-',lr tia sang tring, hgp roi gan vLr6ng g6c vdo mdr ben cua lang l<inri. Tinh goc iao ho'i tia do vA tia tim trong qrrlr'|,nu tao oo.i Iang kinh.? A.0,2lt' 8.0.2-io i.0,5n-' ' D. lo f cau l0: cho nrach di€n RLC noi t;ep. cu6n ddy thLrdn cdm c6 d6 tu cam L = di€n c6 di€n dLrng c= 1a-4Dx (F). Hi€u di0n thd dar vdo hai dar.r rJoan mach la cuoltg do dong c1i€r-r clray, ti-orig rlach ld: A. i =.,,6cosl00nt(A) C.i=J7.or(loont-fXnl lin (H), di0n iro' R : l00Jjf ;, ,,.i Lr = 200Jfcosl00nt(V) . Bi€tr i!.r,rc cau l1: Ngu'd'i ta dr)ng chirm hat a bin phd l6n hat nhan f Be. Do k6t qLra c0a phdn Lrng hat nhan dd xuAi tiir:;r notron tu'do. SAn phAm thri hai crla phin u.ng ld gi? A. D6ng vi borlB C. Caebon 'JC t L B. i =.,6.ot(l00nt *lXe; o D- i =.,6"or(l oonr - *lfnl B. Dong vi cacbon ';C D. Eong vi Ber ili j Be ciu I2: M6t mach 1:: ::l,g glm rnQt tir ciidn c6 di€n rlung c vii cuon cdin c6 do tu cdm L, di6n rro.rhudr, ru, T.q"h,b:"q.\ltul.q Bitit bicLrtlru'c dong didn'trong rnach ld-i = o.rbtt"rtz.loii^l Cho dd ru.cam L.: lrt,rli Bi,€u thu'c hi6u didn rh6 giDa hai ban iu co dang nhu the ndoZ A. u : 80cos(2.l0?txv) B. i; = ggcos(2.I 07 r + nlZ)(V) C. u = I0-8cos(2. tO?t;1V; D. L, = l0'*cos(,2 lai , - "b>fi> ;,::ii;rnilTr::t hao phi do toa nhi6t tr€n ciu'ong dav khi cdn tii dien;i"u. r,.on* rhuc re, c6 th6 cr'r),r;i A' Giam hi6u didn th6 m6;'ph6i di€n n iin d€ giam cu'o'ng do dong dien ir.€n da1, n lin, gidm c6ng suat tc,n nhi€t xudng n2 lAn. B' Tang hi€u di€n th6 o'no'i sAn xuit di€n l€n n lAn dd giam hao phido t6a nhi€t tr€n du.o.ng cldy n2 lAn. C. Ding ddy dAn bing v.Qt ti€u si€u dAn ctu.o.ng kfnh lo.i. D' XAy du'ng nhd may gAn no'itiOu thu di6n ddgidrn chi€u ddi du.d.ng ddy truyAn trii di€n. CAu l4: Co so'hoat ddng cua nriiy Uien rne ta giZ A. Cdm frng cli€n tir. c. Hidn tu'o-ng tu'tr'6 ts' cdng hu'o'ng die n tu' cdu l5: cho lnach diQn nhL'hinh vd, di6n^dp gat rl;?lTu:|,*J; rnqch co giri tri hi€Lr dLrng vd tan s6 kh,,,ig ddi' cu6n day thuin cain'dQ tu'cdm cira cudriddy va di€n rrd'thuan cria mach, ampek6.ry tu.6.ng, ty di€n co diLjn dung c bi6n thi€n' rcni oieu chinh di€n clung to'i gia tri c6 thi uax va uas vu6ng pha. Di€Lr chinh c > c6 rhi: t Bfl ;i rfl ::ri H: il :iil ll; *:lr ill*: ff} D. Di6n dp hi€u dung rr6n ru di6n Ung, s6 chi arnpek€ giar; cf,u 16: Trong ciic c6ng thirc sau, i:6ng ihri'c nao ld cdng thri'c Anhxtanlr v€ hi6n tu.ong quang di€n: A. hr =.2A+g- B. hr=rrr IC'* c.hr=A* ''y'{,,,s^_ ;;;:A_I"j*. l#',,t^t'"n?,iil':1"'ilri,li'lrfruot'on t.ong c6c lo phan 'ing no1 ur,a,, ra do kijt qui va 1nu,n .ou chrrng i,iii A' cric nguy€n td nang ].ir; tf u y€Lr notron. B. cac nguy€n to nhe hdp thLr manh notron. c' cdc nguy€n t6 ndng hdp thtr inanh no'tron. D. cdc nlLry€n t6 nhe hApthu y6,r norron. {liu l8: Mdt day AB ddi 90crn co dau B tha tu clc. J'ao o'ddu A r,Qt dao cidng di€Lr hod ngang co t6n s6 r00rri: ta c6 song di'ng' tr'€n dfiy cti 4 rnfri nguyen. ven to. rri,yeniong,,en cl6y co gid tri bao nhicu? A. 40 nrls B. 60 nrls C. jO,7, D. 20 mis cau 19: Trong m6t 6ng Ronghen' van toc cua electron lthi td'i anotld 5c000knrA. D6 giani .vdn r6c niiy :[:::Ti: jlili l;lrJ]i:'=*;:i ii: [: aa ' o"g"uuo 'i ii'' *," hid;;;ii" uie- rich ;; kh6i'ruo,,g .,,u A. AU = 2100V B. AU = 2000v C. AU = I g00V D. AU = 69.i2y c;iu 20: chon ktit luan drirng v€ ning luo-ng dao do'g cria m4ch r,c;_o: rd tan s6 goc cira dao d6ng, e6 ri didr: tfch ban diu cua tu di€n ,u, khi auo"Ii"n eiE,t c, rltie', or'r*'r.," ru ciin, L re do ii' carn cta cu,5n d6v A.Nangluongdi€ntru'o'ngciratudi6ntai rn6i thdi ditinrtdu'octinhbdi: ry =-$.r'n,"r. 2C B' Nin-q lLlo-ng tt)'truong cta curin canr iai ,'n6i tho'i tji6nr t duo-c tinh bo.i: y/, = Lcl.(l;cos,ort. C' Tai nroi thoi di€m tong rrSng Iuong di€n tru'ong vd rrSn-9 lu'o.'ng tu tru.ong trong.rnach dao d6ng id khiing eoi. t'tang lu'o-ng cta mach dao ao'ng duo.c bdo toirr ia.o oo lo.n: w: w6 + w,: esr/LC. D' Kh! cu6n cdm c6 di€n tro'ddng k€ thi mot phAn ndng ioqng b,un oa, ul .irrva]-''r,,J",hdnh nhi€t ndng n6n dao dong tit din, c6 bi€' do gizirn din theo tt".,oi gian. "o 'svIrE L'qtr uau ur L'rru' cau2t: I\4achclrons6ngg6nrcudncamcoddtu'cirnL=l,5mH vatlr dienxoaycodidndungcbi€nthi€ntu 50pF ddn 450pF. ir'aach nay co thd thu du'o-c ciic ,ong iie,.' ti.c6 bu.d.c song rrong khoang ndo? A. 5,61 rn ddn I 5,48rn B. 56,1 p d€n I 54,gm C. 0,561rn d6n 1 .548rn D. _5I 6m Oe,,r f S+drn. Cfru21: Chorr cdu SAI: A' Tri tru'o'ng bi€n thi€n theo thd'i gian s6 ldm ph6t sinh xung quanh no mdt di€n trLrong xoily ngay cd khi tai d6 khdng co ddy ddn kfn. B' Di6n truo'ng xoiy xuat hi6n gifr'a hai bdn tu cli€n l<hi rai.d6 c6 tii truong bi6n thi6n. Didn tru.d.ng xoay gi[.a hai b6n tir didn ndy c6 ciic du'o'ng sf c song song'ciich aeu va kh6ng khdp ki; - - c' Khi dien truong gifra hai bin tu bi€n thi€ir diiu hda theo tin so f thi gi['a hai biin ru xudt hi€n m6t tD. tru'd'ng xody voi cdc duong cdm ri'rrg tu'khdp kin hinh trdn co "r'rie,-, Lie" trrji"-rrr"" ran s6 f. D' Ei€n truo'ng xo6y c6 cdc dud'ng sric khep kfn bao quanh cdc duo'ng cam ri.ng cua t1,.tru.ong bi6n thidn. Cdu 23: Tirn cALr trA lo'i dring trbng s6 ciic c6u du.oi dAv: A' Mdv nh6t di€rr 3 pha co 2 phAn: PhAn In-e g6in 3 cu6n ddy gidng nhau (hay 3 cdp cudn d6y) dat l€ch nhau tzo0 trenloi ,atqrrutoi"a prra, i", *a", loir,7>, ,,,ii* *;'.u. rir.quay tron ddu (roro). B' Khi 3 'ach ti€Lr tlru di€n gi6ng h€t nhau ttri :aong aien ruo boi rnay phat Ji6n 3 pha la 3 ddng di€n xoay chidLr cti dang: i1 : I'cos(Dt; ir.= lecosiot + Izoo); ;;:,;;t(,:r - 1200), trong do co c6 don vi ld radls. c' Ddng di6n 3 pha ld he th6ng dong di-6n *oay ctiiAu iao b6'i : rnay pnai o]cn ,ot pha ri€ng bi€t. ,,,'"1;!l' chua n6i vd'i c6c nrach iieu t[u aien thi"3 r;;;;'e; d6ng tao uoi ,a/fr,at di€n 3 pha gidng nhau v6 c6u 24: Con lic ld xo treo d' trAn m6t xe ldn, dang thqc hi€n dao d6ng dieu hod. cho xe l'n chuy6n d6ng xu6ng rn6t d6c nhin,.nghi6rg g6c cr so v6i phuong ngang, b6 qua moi lu.c can thi: . A. con ldc tharn gia aong tr i.vito 2 dao ct6ng. o' - J euq rrrur rr'ru oan Inl: B' chu kj'kh6ng doi, ve con I6c dao dQng in"o pt,u.o.ng thing drmg. c' chu ki' kh6ng d6i, va con I6c dao dQn! theo phu'on! nghieng gic zaso voi phu.ong thing dung. D' chu kj'rrh6ng ooi, va con ric dao d6ng theo phuo.ng "io"g gi. ;d;;# ;;: c6u 25: Con lic do.n treo o'tran m6t thang T1{, d.1ng dao d6ng dieu hod. Khi con l'c v€ dung rr5.i vi tri c6n bing thithaig rndy uft oiu "rrrtd;r;o;g nhanh ddn d€u ran rr€n rhi: , "on ldc v€ dung tr5'i ,. A. Bidn dd dao d6ng girirn. c. Lu'c cang ddy giarn. D. B;; Ji ouo d6ng rdng. ffloT;",:;:t*if ;:,TH ff?r?i;l noi riep voi nrrau, r6i ,nic "r" *0, v6t d€ rao rhanh h€ dao d6ng thi A. Chu kj,giarn 2 lin. C. chu ki,tang vt lAn. B' chu kj' giam "5 lin' D. Chu kj,kh6ng thay d6i. CAu27: M6t di€n cuc phing bing kinr.lo4i c6 gioi han qrlng,.diqn Lo = 0,332pm, du.o-c roi b6.i l:ic xq 2.= 0,083prn. Vdn t(jc ban dAu crc dai cija.r"_ ,::iiJn quang lien la.uo,"n_. Cia.s,il-ti-'i roi khdi rim kinr loai, cdc ;i}:ffili.ngav rn6t di€n truong cdn E = 7s}vtn.d[.i'".r;; r[e 'ti-*a",, i,,], ,"u, rn6t khoing r. hdy chon A.Vc,,,u* :6,28.108cni/s; l= l.5crn. g. uo,n"* =2,2g 1 07cm/s;l= l,5mm. C. von'n.* =2. l06cnt/s; l: l,5cln. ;.,il_ =2.10".,r.,/r;l= 3,5cni. .'J{;1,i$ii:ff1i,;1fflj1-,ilT,H'"':;::ln*r*ri;;g;"='0,,, phuong ,rinh dao ddng A. x =5cos(4nt - n/3)(cnr). B. x = 5cos(4 nt_ n/6)(cm). . C. x= 5cos(2nt + 5nl6Xcrn) D. x= Scos(nt+n/6)(cm). ciu 29: Mdr rthe S phrit ra 6nrr s6ng don,^i::o bu.oc s6ng l I o,:uT chi6u d6n hai krie rang s1, Sz vd.i srsu = 0'5tntn' N4at phdng chrl'a SrS2. cdch ri.,an rnot khoang o = t"m. Nguon s ra ,rd. k];;'nlp, nro.r6ng din khe S. Tfnh dd rong 16i thieu cua l<he S de he van uien m6i.;j6;;. , ci."ilSrS: rnor khodrrg d = -igcnr. A. 3nrnr' B. 5rirn., C. 0.3mnr n n ._ Ciu 30: Phdt bidrr ndo sau da,v la sAI khin6i v€ d6ng ndng ban diu cu.c dai cia cdc electro' quang didn ,,,.fi,',",,ii-* ndng ban dA, cuc dai cda cdc electror', q,iung ole" i.rro,rg C;;r6" ; cu,o.ng do c,ia chirn s6ng ii' D6ng ning ban diLr cuc tJai cua cdc electron quang di€n phu tliudc vdo bu'6'c song cua anlr sdng kfch thich. ar[; o'ont nrng ban diu cu'c o'ai crla cdc electron qruni iign Lr,ong phLr thu6c uao uan ch6t kim loai ding ldrn D' EQng nang ban diu cu'c dai crla cdc electron quang di€n phu thu6c vdo bdn chAt kirn loai dung lam cat6t CduJl: Khiginqudnangrnlvaom6rlo.xo,no.dao.aO"sv6i'chuk)r;, =;;r.;;, ginquandngm2vdoloxo ;l; l'" d6ng vu'i chu ki' T: = 1,6s. H6i khi g5n d6ng thdi tui qua n{ng m1, mz vao lo xo thi n6 dao d6ng v6i chu A. T: 2,8s B. T = 2s c. T = 4s D. T = 1,45s. ,TJil;," la s0 electron bi but ra khoi catot cDa mot dong orun* aicn tronimolgidy khi dong di€n bdo hoa td A.N=1,25. l0rs B.N=1,25. l0r4 C.N:1.25. l0r3 D.N= l,Z5:1A,2 cau 33: Trong thdp' scing dm lan truf ip voi van t6c 5000rn/s. N6u hai di€m gdn nhdt. ,u, uu.u" pha cria s6ng l<h6c nhau nrot goc nl2. cacl't nhau nrdt khoang bing rnr, rhi tAn rJ.o"lur*';;"#r; bao ntri€u? A.250A Hz B. 5000 Hz C. I 250 Hz. D. 104 Hz ;1|i}, ,9;::Jir?:: rd cita rn6t dong vi phong xa ld r. rai thd'i didm ban diu rniu .nou *. nguyen rr,. Sau rhoi A. Con lai25Yo sd hat nhAn No C. Con lai 12,5% s6 hat nhdn .lrj,, Cdu 35: Cho nrach di€n nhu hinh ve. B. Ea b!ph6n rd25yo s6 hat nhAn No D. EA bi phan 1611,5o/o s6 hat nhdn,Nn C Biet u = 40J2cosl }Anre). Vdn kti Vl chi 20V. v6n k6 Vz ch i 20.,6 V vd am pekd ch i I A vd Z, = 2Zc. EiQl tro'thuAn vd dung lchdng cia tu C co giri tri Uao nhi6r,r? iAr l"*" _ __*" A A.R= I0'[O;C= l0'3/nF c.R=20e:c =10-3lnF B'R=10"6o;c=10'3/2nF D. R = 20.6ei ; C = I 0-3l2nF a-u, ].u^, chidLr dai con ric don r= rnr. phia du.6.i di6rn tr.eo o tr6n ohu.cms th;no v do ri 6 m o ; ;il; :;#d;, ; ;.i r : ffi, l'J"':il ii:H{ !T.? l;n: Jiil: J:H ;"'';[;i ;.=,j I idH : nhe' Bd qua ma sdt. Bi6n dQ dao dgng o hai ben"i1rt"i,r-uarl ,u, rt. A' :5.23rnm; 42 = 3,73mm- B. Ar = S2,:cm; A2:37,3cn. C. A, :5,23cm: Az = 3.73cnr. ;:;; = ,ir"*, Az:3,37cm. Cdu 37: Chon d6p an dung: phdn ring t6ng ho. p ciic hat nh'n nhe xAy ra A. Tai nhi€t d6 cao. ;;";':;,i.'lli,r^'" c. rai ;i;;il ,.i, "uo. B' rai nhiQt ciQthdp' ' D. Du'oi iip sudt ,6t oo. CA.u 38: C6rg llrilc ndo sau d6y di6n ra dfng vo.i may bicn ri-3 kh6ng bi hao r6n ndng luo.ng (ti s6 truy.n bi6n rhe): A lz=l! s.!r_-lr_ c.}=r. D.!a=1_ I' U, "' Ur- n, "' l, - n, Ur n? c6u 39: Trong hien tuong giao thoa s6ng tr€n-mdt chdt rdng vdi hai ngu6n o1 vd 02 co cing phu.ong trinh dao 5l!i: +x;T;:Iil: 53:;xllglrg;-";: r50 ;" ;;;;;' ',,;t; ';;; ;; ,*, .nd, ,dng ,d v = i'cm,s s6 A. g. B. 5, c. 3, D. 7, Ciu 40: Trong miiy ph6t di6n: A. phAn cdrn ld b9 ph{n drlng,y€n. phin, ri.ng ld bo phdn chuydn d6ng. B' Phan cdrn rd ro.ptran .rrrve"lo,ig, onun on* rd b6 ph6n i*i.ng y€n. ui,,;f;,oi,'X;:l'ili:t;An':"g 'oir,ii,rl'g drrngl€n, r'oa rne;;td, d6ng, nhune b0 g6p di6n thi nh6t .,,;6]::j!u0c cdu tao cila rn6v' phan cdm cfrng nhu'pharr f'ng c6 tne ta uo phdn dri.ng y6n hodc ld b6 phan [...]... rniu ch6t ld x, o'tho'i T thi sd irat phan rd trong khoing tho-i gian t: A.(x-1,)ln2lT B xt1 - 1,t2 - tr lir c.x*y giarr i2 ld v Ntiu chLr D.{ x -y )Tlin2 ki ban rE cua nr5u ld f PE{AN TII < Fhd:n cho thi. sinh thio chu'nng rrinh niing cart tb cfrtt 5I d6n ci,u 6{}> Ciu 51: N'i6t dia ddc, dong chAt, khdi lu'orrg l0,0kg, b6n kfnh 1,00m quay v6'i v6n t6c g6c ro:7,00rad/s qLranh thing dri'ng, di qua tAnr... tir' A S6ng diQn tu co di€n trLrons vd tiL truong L''i6n thi n cLrng pha uu B FIai vecto B vil E vu6ng goc vo'i nhaLr vd cLrng vu6ng goc voi phLrong tlLrye n $ U* p qr-ray cira n6 ld tir vecto E d6n B C Ntiu cho cdi dinh 6c ti€n tiieo chi6Lr triry6n s6ng thi chi6u quay cira no lA tir vecto D NdLr cho cdi dinh 6c ti6n theo chi€r, irLryen s6ng thi chi0r-r !^ Cf,u l5: Khi gan mdt vdt c6 kh6i lr-ro-ng... Flinh A Dd thi hinh 3, I] Do thi hinh l 2 crx f{inh f{int C Do tlri hinh llinh 3 l D D0 tlri liinh CAu 29: Tim phrlt bi6u sai vC hie'r tuo-ng quang dAn vd.hien tllgng qLrang di6n A, lon quang tro' hoat d0ng d;ro.,: voj 6nh,tlrrg, h6.1q lgoqi lhAn B Chi co t€ bdo qlrang di€n co iat6t tam bang krm loar Krern moi hoat dQng cliro'c vri{ dnh sdng khii C, Cong thodt cira kim loai ld'n hcm cOng cdri thi6 t Oe... khoang r Khi cli 60rn lai gAn nguon thi ngLtoi iiy thiy tang gAp 3 tdn Gi6 tli cira r A.7irn ll 124 m C 1,42 krn D 142 ni A.25mJ L cLt'o'n!t do arit : Ciu 52: TAt ca c.4c hdnh tinh cl0LrqLlay xlrng qLranh Mar Tro'i theo cimg rndt clii€1r.1'rong Troi clAy clric cliin ld h€ qua cia A su'bao todn vdn t6c (c1inh lLrat I NiLr To'n) B sr,r bio tozin nirng luong qLrd trinh hinh thi\ nh h0 Mrit : C Sr't b6o todn... bing: A 800 vong/ phut B 850 vong/ phrit c.7a0 voirgi phut D 750 vong / phfrt Cdu 55: M6t chat nh6t quang c6 l rdc cr-tc !"1cia m6t vat dao d6rrg diiu hod thl d6 thi sE ld: B dr"roirg elip A rrr6t dudng cong l . cho c,ric thi sinh tir cLu I ddn cLi 40> cAu l: Trong c6c thf nghi6m sau ddy, thi nghidrn ndo c6 th€ do bu'o.c sone dnh sdns ? A. Thinghi€m trin sic dnh shng cuaNiuto'n mAy diQn rrr6y tdng thil vd d noi ti6u thq m6y ha thii. g. ;il O aar r" .,t. "f1d m6y diQn may ha tfr6 va dat o noi tieu ti,u m6y h4 thiS hoAc teng th6 tuy. cu ph6t ra c6 d6 thi dugc bidu di6n theo thoi gian c6 d4ng: A. Duong cong bAt ki B'Eu,*9 hinh sin' c. Duong do thi him cosin. D. Bi€n thi6 n tuan hoan. Ciu