t r-/ J 2t', E+i r,{Qc nG{oA HQA Tu NTrrtN EE TI{I T'E{{.IEAI rjqc X-AN 5-NAM rrOC 2010 - 20X1 MON THI: VAT LY Thdi gian ldm bdi: 90 philr, e e e Chobi€t: hangsOPlangh:6,625.10-14 J,s; d0 l6ndi6ntichnguy€ntOe:1,6.10-'eC; Me de rhi TRdId\TG T.FLPT' CHUYEN KHT.N t6c d0 6nh s6ng chdn khdng c : I 08 m/s 134 I PHAN cHUNc cF{o TAT cA rgf sIMl (40 cAu, til.c6u I d6n ciu 40) C6u t: Miu sic tr€n bong b6ng xii phong dugc t4o thinh ld hi€n tugng: A Tdn sic rinh sring B Giao thoa dnh sdng C Nhi6u x4 iinh siing D Khfic x4 rinh siing Cdu 2: Trong m6y quang pfrO tang kfnh 6ng chuAq trgc c6 tiic dr;ng A Tao chtrm tia song song cira cdc c6c tia s6ng chi6u vdro ldre hep F d mQt dAu cua 6ng B Phdn tich chim tia chi6u vdo 6ng thdnh nhiAu chirng tia don s6c song song C HQi tU c6c chum tia song song don sdc thinh c6c vpch dcrn sic trdn kfnh K cria 6ng D T4o quang ph6 chuAn cira ngu6n S Ciu 3: S6ng di6n tri kh6ng cd tinh ch6t niro sau ddy ? A Trong sdng diQn tir thi dao dQng c&a diQn truang vd tr.r truong tai mQt di6m lu6n d6ng pha vdi B S6ng di€n fi Id s6ng ngang C S6ng diQn tt lan truydn duo-c chdn kh6ng vd mang n6ng luong D Tiong s6ng diQn tir thi dao dQng cria dign truong vi ttu truong t?i mQt di€m l€ch pha nl2 Cdu 4: Co thO nguoi b4n ld ngu6n phdt tia h6ng ngo4i c6 budc s6ng A.9 m - 8.0,9 prm CAu 5: HiQu di6n thti xoay chiAu giira hai dAu dign trd thuAn di€n frd la: A.200 w B 150 W C6u 6: X6c dinh h4t nhAn X phrln u'ng h4t nh6n sau: tt.6oBe p B,:Li C.9 pun R = 100O c6 bi€u thric: D.3m u = l00sin(cot) V C0ng sudt tda nhift trdn c.50 w +7 Be D 100 ui -+ A + X C J" LT CAu 7: C6 thd phAn lo4i h4t so cAp thdnh A Phdt6n, lepton, hiperon C, Phdt6n, lepton, hadron D a 2tle B PhOtOn, lepton, nuclon D Phdt6n, lepton, barion Cdu 8: Xdt lic dao d6ng diAu hda vdi tin sd g6c dao dQng ld co: i0n rad/s Tai thoi di€m t = I s, v4t nim tai li d0 x ='-2 cm vii van t6c co d0 lsn0,2T m/s hudrg v€ phia vi tri cdn bing Hdi tqi thoi di6m t = 0,05 s, vdt dang d li dQ vd c6 v4n tOc bing * bao nhi€u? t'" A x = +2 cnr; v = +O,?rc mls, C, x= -2 cm; v = +0,2r m/s {r ,n B, x: -? cm; v: -0,2n mls D.x:+2cm; v=-0,2nmls CAu.9: Chi6u vdo h€ giao thoa hai khq Young chirm 6nh s6ng tring c6 budc s6ng thay AO; tl€n tuc ru 0,40 pm d6n 0,76 pm T4i vi trivins6ngb4c4ciadnhs6ngd6 (7,:0,76prm)cdnc6mAybricxanfrachocucdaigiaothoa? D.3 c.4 B.'t A.5 CAu l0: OOivOimot hieu di€n thtl xoay chi6u thitrong m6i chu ki,T0, thbi gian nid hieu digri th€ ,,^ , L.^ tfc thoi c6 giri tri l6n hcrn hiQu di0n thd hi€u dqng cia n6 ld ,d.-l ao =j ^.-3ro lJ l =- 44 L Cdu 1l: Xdc dlnh n6ng lusng toi ttiicu cia c6c phoron ^1d6 thuc hi6n phdn img sau: ? = l2u; m(He4) = 4,0026a;h = 6,625.10-t'Jr; , = 3.108 m/s A 6"8 N4eV B.7,3 MeV Ciu T- n L'l r-To =- C.8,2 MeV ail D I -=lt ^uL C * y -$(lHe) cn" bii5t: m(Cl2) D.5,9 MeV 12: R6to crja mQt m6y ph6t diOn xoay chidu mQt pha quay voi t6c d6 900 vong/phirt c6 cilp clrc Bic Nam s€ t4o dor'g , l , t A olen xoay cnleu co ian so: A.50Hz B.60Hz C l00Hz D.120H2 CAu 13: M4ch di€n xoay chiAu kh6ng ph6n nh6nh gOm lAn luqt ba phAn tri: di€n rd thuAn R = l0 O, cudn cdm c6 di€n trd r = fJ vi d0 tU cirm L = 0,2n H, tg diQn c6 di€n dung ld C = l0-3ir P Mic vdo hai dAu m4ch mQt higu diQn thi5 xoay chidu co gi6 tri hi€u dr,rng U = i20 V vi.tAn sd f ttray AOi dusc V6n kti mac vdo hai dAu do4n m4ch g6rn cuQn cdm vdtlt diQn sE chi ts Hisu dipn th€ khong d6i le 120 V n Uieu diQn th€ nhd nhdt la 20 D, HiQu di€n th6 tdng l€n tsng tAn s6 f C HiQu dign thd lcrn nhar ia 20 V V CAu 14: M4ch rliQn xoay ehiAu kh6ng pbdn nh6nh g6m diQn trd thuin R, cu6n c6m thuAn c6 c?rm khiing Zsvittr1 dign c6 dung klrdng = ZZy.Yito mOt thdi di€m hieu dign thii tr€n diQn trd v?i trdn tq diQn c6 gi6 tri tric thdi tuong ung ld 40 V vd 30 V thi hipu diqn thd t0'c thsi hai dAu mAch diQn ld D.25 V C.50 V A.55 V, 8.85 V 'l'r€n (k€ cA hai nrlt d hai diu) Di€u ndo sau ddi 1,2m xu6t hiQn s6ng dirng co nft s6ng ssi d6y hai diu cti dinh, chidu Ciu i5: ddy sui? Tnngll4 - Ma dd thi 134 A- Buoc sdng Jd 0,8 m 9.9-?" didm nim gifta hai n[t li€n ti€p dao dQng cirng pha ! {hoang ciich gi&a mQt nft vd m6t tung c4nh n6 tj O,g m D Cdc didm ndrn d hai b€n m6t nLlt dao d6ng ngugc pha Ciu l6: Chon cdu sai A' Quang di€n t.d vd pin quang di€n ho4t dQng dua vdo hiQn tuong quang di€n B Laze bdn dAn ho4t d6ng dua vdo hiQn tuqng-quang di€n ' L6 vd electron d5"n gi afi oier chat quane ddn *' !'D Nhi€u chdt ""rgll.* quang d5n c6 gidi h4n quang ddn nim virng h6rig ngoai CAu 17: Tirn ph6t bi€u dring v6 phdn *ng ph6n h'ach vd phdn *'g nhiQt hach: A Cd hai lo4i phdn rlng h.6n d€u tda n6ng lugng B PhAn rng nhiQr ha.-lr 06 xdy hoa phln ung ph6n hach C Ning lugng cia m5i phan ung nhi€t hach lon-hcrn phdn ring phdn h4ch D MOt phdri ri'ng thu ndng lugng, mQt phdn ring toa n-dng luong Cdu 18: Hai didm M, N nim midn giao ihoa ndm crich cdc ngu6n s6ng nhfrng do4n bing d1y : l0 cm; d2s = 35 cm; vd d1x cm; d2x = 20 cm' cac nguOn phrit s6ng d6ng pha vdi budc s6ng I = lm Tr€-n duong rt,1i.r cd bao nhl€u di6m dao dQng vdi bi6n d6 cuc dai? "3i :30 A Cdu B 10 l9: Tim ll c.9 phrir bi€u sai D 12 Quang ph6 vach phdt xa crla cdc ctrAt khac thi khdc v6: A Mdu sdc cdc v4ch ph6 C DQ sdng t! d6i gifra cdc vach Ciu 20: A B 56 luqng cdc vpch ph6 ph6 D 86 rgng"c6 S6ng dign hr c6 tAn s6 tOtr4Hz nim virng ddi s6ng niro: -c S6ng B S6ng song trung ddi "?;tp;;: ngin cau 21: Chon cdu phrit bi6u sai n6i v€ dao d6ng ri€ng kh6ng tdt dAn mach dao d6ng A' Ndng luong cia mach ddo dQng ri6ng gdm ning lugng diln Fuong t6p trung D S6ng cr,rc ng6n d ru di€n vd nang lugng fu truong tflp trung d cu6n cdrn B' Nang luqng cria mach dao dong ri6ng t4i m5i thoi di€m d€u bing n6ng luong di€n tru,ong cuc c4i hoflc ndng lug'rg tir truong cgc dai Iai moi thoi di6m, ndng luqng cria m4ch dao d6ng ri€ng d€u bSng D' Trong que trinh dac d6ng ri6ng, n5'ng luong diQn trumrg giarn bao'nhieu lAn thi nang luong tir truong tLng dfng b6y nhi€u I ldn : CAu 22: Dd thu duoc sdng di€n tu c6 buoc s6ng 2' 300 m, ta cAn dirng mach dao dQng LC g6m tu diQn c6 di6n dung = c l0 pF bing bao nhi€u? L6y n2: 10 4.2,5 B 2.5 C 25C D 250 pH Dat hi€u di€n thti u Uesin(ot) vdo hai ban ts diQn c thi cuong rid dong di€n xoay chi6u m4ch sd bi6n d6i theo ,?1' bi€u thric: vd cu6n cirm c6 d6 tu cdm H mft : 9it / A i = %Ca;sin[ *, -; nH _\ rt cr-_(*"'2) ) /' c.i=%rin( ,t-o\ Ca \ tj CAU 24:- Khi mQt v4t dao dQng di€u hda / -\ i = I-Q-rin]1t + lL D \ i =(JoCotsinl a:t + thi vdcts v6n t6c: I "-\ t) I A lu0n OOi ctrieu di qua g6c toa d6 ' B ludn cing chi€u vOi vJcto gia tOc C lu6n aOi ch;Au tctri vf,t chuyln dOng d€n vi rri b;en D lu6n ngugc chi6u vdi vdcto gia iOcl Ciu 25: Mdt v6t dao dOng diAu hoa theo phuong trinh: x = 2cos(2trt+ n/6) (cm); dd t dugc tfnh theo don vi gi6y G) D6ng ndng cria v6t vdo thoi di€m t : 0,5 s A dang t6ng I€n B c6 d0 lon cgc d4i C dang gidm di D cd d0 lon c$cti6u Chu 26; Dao dQag rri ld dao dQng mii ngudi ta dd: A Ldm mit lgc cdn crla m6i trudne B T6c dung ngogi luc bitin doi tuyEn tfnh theo thsi eian vao vdt dao - d6np -:"or C Kich.thich lai dao d6ng sau dao dQng oa uitiihin D TruyAn ndng luong chi vdt dao d6ng itre"o nrQt quy ludt phir hqp c6'u27:cdcmricndngluongctanguy€ntriHidro lit: crla electron' Er #Gr),vdin:1,2,3 rusngrmgv6icdcqu!d4odirng n Khi electron chuydn ru qu! d4o N v€ qu! dao L thi nguy€n tt ph6t vach ph6 c6 budc s6ng 4.0,4341 pm B.0,4102 prm c 0,4g61 pm D.0,6563 pm : vdt dao ciong theo g6m vat.kh6i luo.ng m = 200,g lreo vdo lo xo d0 cimg k 100 N/m' cho ld: dQng que dao trinh xo lo dai cua uien?O a1"+ cm LAy e: t d ,ils' Do bi6; dang cqc D' cm' C' cm' c6u 28: Con i6c lo xo rhing ;;"";;'rhA"c ;;"; "; A' cm ... }1c dinh t6c d6 cia.mdt ngu6n Am b6ng c6ch sri dsng thi. :t bi tAn so am rchi ngudn dm chuydn dQng thang -C:u,s], f thi r b!.dangdrnrgy€n d " thi tniet bi.do dugc tAn so am la724Hz,con ngu6n dm... dugc tAn so am la724Hz,con ngu6n dm chuyZn dQng rhing aeu'ufil Jng iiigi" t33 0O qo ra.xa.thiclt bi thi thiOt bi duoc tAn.sti 6m.ld 606 Hz Bict ngu6n dm vd-rhiilt bi tu6n tn! n'i,n n,0, a"*g thdng,... rad/s D radls quanh nr6t truc c6 dinh Khi t6c d0 g6c c0a v4t tdng g6p d6i thi gia t6c todn phAn cia m6t D6, m?ru B xanh lam c6 thii hdp thu dugc bric x4 miu ndro sau day: C Lgc Cam D Chdnr cAu 55: