Nhờ Thầy , cô giúp câu 30&48

TRII'ONG EHSP HA NOI TRT'iNG THPT C}ilJYfrN an Tlrr THrIs$ HQC LAN 2 -2013 *' a{*N vAr tf Lrlfr#"${};;' Hg, t€n thf sinh: l.rn{x cHtING cHo riT c,{ c;ic rl{i SINH i40 cgu, tilcsu I tr6n $u 40) tiu l: Mach gh.9n sdns c*a mQr rniiy thu v6 ru;,iin gOm mOr cu6n day c6 do ru cim L vi m6t bd ru dien gom tu di9tt co dinh Cp mic. n6i ti6p v6i.rn$t tQ xoal C. T\,r xoay cd di0n dung rhay d6i tir rO pn 4en 2i0 qf f]to viy mdy thu cd thd thu dLrgc cdc s6ng c6 budc s6ng rir l0 m diln 30'm. D0 ru cam L cta cu6n ddy bdng A. 0,84 pH. $. 0,?4 pI{. C. 0,94 y,I{ " t}. l,?4 p}{. Csu 2l T4i hai didm .{ vi B tr0n mpt ch6t lcng cri hai ngudn phft s6ng dao dgng theo phucrng rhing 9T"g y :d: ?l*ig trjnh lin lusr Ii u1 = arcosi3onr * rrzl iauz = aios(3orctllfOc ab urufi, rJni tren.mgtchat ldng ld 60 {cmA), Hai ditlm p, e rhLroc h€ van giao trroa cir'higu'k[6|;.#;;;: ngudn li PA - PB = r cnr, eA -QB = 3 c:m. Hoi cric di6m p, g nam tren duong dao aong.;j. dii ;;, .; ti€u? Cf;u 3: i{qt msch dao A$ie^li }fl$,lv .di:1 1, | = 25 nF, cudn cirn c6 L = 3,f mH. Eign rfch cqc d4i cia tg dign cd gii tr! ll36,3.10-e c. Tgi thlidiim higu difn riii giiia hai hin tp c6 d0 t{rx ta t,l v rhi cudng d$ dbng di€n chqy rrong mph cd dg lrn li A. P ctrc ti8u, Q cuc dai. C. P cyc dai, Q crc ddu. A.0,05 mA. 4.29 mls ,t. {rsl. ')' A. vii mOg*rec {MHz). C. vii chgc m€gahec (MHz). B.P, Q thugc cpc rlai. D.P, Q thufu cr,rc ti6u. C.0.J mA" D.25 mA. C" 6 mls. S.5 m/s. B. viiaghin rnOgahec {MH;), D. viikil0hec {kHz}" Cf,u 4:I4$t ingten rada phrit ra nhfrng s6ng difn tu ddn mdt vAt dang chuydn dong vi phia rada. .l-hi;i gian tir lic dngren phdt sdngddn ldc nhgn sdng ph6n x4 rrd tli li B0 (psi. Sa,., ; pi,,iiAo tffiffi,il; gian tu lfic ph:ir song ddnoden.hicrhqn-s6ngphin xa lin niy re zgirLs).gigi16. a0 -;;;il;;; trong kh6ng khi bing -1.108 (m/s). Tiic' d6 trung binh crla v6t li S. 2,5 mA. 8.4 m/s. S. ,lr(s). n. {rrt. 4" C$u 5: Tr€n m{t nu*c cd hai ngudn sdng gi6ng nh*u A vi B, ciich nhau khoang 12 (crn) dang dao dgng vudng goc.uT *it nudc tqo ra sdng cd bu*c sdng I cm. CqriC li di6m kerimit "-*., re?f, JA, j1ri nguon vi cdch trung di€rn o crla AB m$t kho&ng I (cnr), s6 oiem daa ddng vusng pha u*i ngubn J tra,, doan CO li A. 10. 8.6. C, T. D. e. Csu 6: D6 truy,ln cdc tin hi0u truyin hinh v0 triydn, ngucri ta thwting dirng cdc s6ng dign rir cd r6n sd viio khodng Ciu 7: M$t v*i dao d$ng diiu hdn tr€n qu! daa li rngt daan rJrang dhi l0 cm. lihi v3t e6 rdc rtg t0 cmls thi dO ldn gia rdc 1ia0,6 cm/s?.Chu ki dan dgng l* c. fr,l. ilAu 8r E[i "-io hai diu rloan ingch RLC n6i ri6p niQr diQn dp xaay chidu cd dn sii f1= 50 Hz rhi doan mph cd c&nr khdng 40 Q, dung kh;{ng 160 Q vi tdng kd hing Zso O" N6u diCIn rip c6 tin sti l, =iOoll, thi t6ng tro cua rnach bing TRTNC HnC plto 1'lloNc ciruygll sH $p I{A N0I - THr THIJ'DAr HgC 1.,\r.,t z xam rot: Trang lf - Ma d& thi3s? Swu tdm: http ://vuphan62hn.violet.vn/ Page 1 CAu 9: Tia t* ngoai dugc phdt ra rdt manh tir A. rnin hinh v0 tu5rdrr. - B. h$ quang di$n. {1. lb vi srlng, D- lft sud'i di$n. Ciu l0: Dg4n mach AB gdm m6t d6ng co di-en ric n6i tiilp voi m6t tudn ddy. Khi dqt vlo hai I ' mgr dign dp xoay chidu thi diQn dp hai diu dgng cr som pha 3so v6i d$ng diQn vh cd gid tr! hi$* ,: lI U, flign dp hai diu cugn day sfm pha I so raitilrrg di$n vh cd gi6 tri hi$u dpng 1i u.,6 ' ni4rr hi6u dlrng git}a hai ci6n dopn mqch AB li A. U"fr, 3. u"6. C, U"if . D. U,f;, Ciu 11: S{$t con l*c Id xo dao d$ng diAu hai theo phumg thang drng, t*}q,blnlt cf .mdi.phrit vit thvrr hi6n dusc 240 dao <10ng toirn ptrin. Trong qud trinh dao LlQng, ld xo cd chi€u dli nhd nhdt lh 50 crr. ctriiu Oal tm nhdr lI 6b im. Chbn gdc rqa d0b vi tri cin bing; chi6u duong cria truc toq d6 hu6ng xu6ng dudi. g6c thbi gian lir h1c lo xo c6 chiiu dii nhd nhit. Phurng trinh vin tdc cria vAt th A. i,=40nsin{&n+r}(cm/s). B. v=40nsin8;r{cn/s)' C. y = 4Onccs8ru (crn/s). D. v = $Onsin8m {crn/s)' Cf,u 1l: Trong b6n brtc xp hdng ngn{, tu ngoqi, Roa-giren v} gammn, birc xg cd tin sO r*O drdt lh bire x4 A. gamma. B. hting ngoqi. C. t& ngo$' D' R.m-ghen Cfiu 13: frCIn m[r nuSc cd hai nguin k{t hqp A, F ciich nhau 30 tm, dao d$ng theo phuung thing drnrg, c6 phucrng trinh: uo = lgsin(40;rr + Il **l ur = Scos(40nt) mm. Biilt t6c d0 truydn sdng tr€n b- mpt nu6c lh 1,6 m1s. Xdr hinh ch* nhgt AMNB tr€n m{t n**c, trong d$ AM = 40 cm' S0 di€m dao d$ng cqc tiiu trdn doqn MB li 4.5. A.300 {}. trung ttm l) 4.4,8 nurt A. 1,600 s . B. 80 *. B, 3 rnm. B. 2,200 s. c,1?0(}. c.6. C. 2,4 mnl C. 1,436 s. D. r6011. p.4" D.4 mm. D. 1,214 s. C*u 14: Trong thi nghi$m lfl4g {Yaung) vA gia,: :iraa inh sdng, k}o*ng ctuh gi'.ra hai khe l} 1,? rnn:, Khoing c{ctr tfi hai lbe A6n fr*n quan'sdt tl Z m, Chi€u vio hri khe ddng thoi hai bfic x1 r1o'n sic X, = A,4S/-rnve 4 = 0,6{pn . Khoang cfch ngin nhit gl*a hai vin sdng c6 cirng rnhu so vui v$n sing C6u 15: Mqt s6ng ngang truy&n rong m$t rndi truong e6 phuong trinh u = tJ66os2r(ft - { ). niit u+n n rdc cyc d4i crla ctrg ddng cria phin tri mdt trulng gdp a lin rdc d0 truyin s6ng' H0 thr?c nio du6'i div ll dfrng? i. r-* B. L=lrUc. C' l=2nUo^ D. l=3$. 4' 2 C6u 16: M$t corr lic d,m tlao d$ng nh6 c6 chu ki !'* 1'9g6 s' Tich iliqn hm cho v{t vh cho con ldc clao dqng hong mqr difn l.rudng dCIu ce pnutmg thnng durrg hudng xuiing du6i tht thdy chr: l<i '{=:qNiu Oaoif,i6uiien rubng vh gi* nguyen d8 ldn cria cucng rlq diqn truring thi chu kl dao d$ng msi crla con l3C la Cfiu 1T: Eoirn mpch RLC kh$ng ph$n nlidnh mdc vi.o mpng di$n rAn sri gdc rrlrthi cim khring lh 30'O vh tiung khdng li 90A, Niiu n ec ulo mgng dign c6 tin s'3 gdc o1 = 600 (rad/s) rhl cu&rrg d$ dnng diQn ctng pha vdi dipn r4p & hai dAu dopn mach' OiA tri q la A.200(rad/s). S. 1800(ra#s)' C. ?00",6(rid/t' D' 600"-fi {radls}' TRUNG I{eC pHfl rsfiNC CI{UYf,N DH sP IlA NO. I - 1T{l TH1J l}Al HQC LAN ? Ndm ?013 Trang 2[ - Mn il$ thi35? S wu tiim : http ://vuphan62hn.violet.vn/ Page 2 CSu l8t Phrit bidu nAo sau d6y khdng dring? A. ciic vecto[E trong sdng difn rri lu6n vu6ng g6c vdi nhau v] dao dQng nguo. c pha nhau. . It' Khi.n$t ty ro*e biiin thitn theo thoi gian thl nd sinh ra mqt dign tru*g nne e6c dutrng sr?c Ii nllrng duong khfp kfn bao. quanh c6c duong c6m fng nr. I I :?19 di€n li khdng hAp rh! ho6c phin ia cdc s6ig (di€n rir) cpc ngin. D. Khdng ths c6 di€n rrulng hogc til trusng t*n t4i ri0ng bigr, aoc rai uJi nhu*. Ctiu 19: Chqn phdr bi6u kh6ng dring kni n6i vA sdng im? *.y1 toc tmydn ary nhy rhu6c rfnh din hdi va fh6i tu.qng ri€ng cria mdi kuo.ng. B. s6ng am truy€n to'i di6rn nio rrong kh6ng khi thi phAn u H,o-ng l$i rai dd sEiao d6ng rheo phuong wdng goc vdi phuong truydn sdng. . c. s6ng im nghe drru. c c6. tin s6 nim trong khoang rri r 6 Hz d6n z0 000 Hz. s. sdng im 1) sil lan tmyin c6c dao dgng co rrong m6i trucng khi, I6ng, rin. C$* 20: M4ch di€n gdm diOn trs R =30\5O nni rldp voi t9 didn a-*r. Sifn dp tfic rhsi & hai d6x doan mpch li u = r20r6cos r00nr {v) . }0ng di€n rrong dagn maeh cd bidu thric A. i = ?.lTcns(roonr +f i (Ai, c. i = 3.,ffcosiroorr +fl {A). E. i = ?.lTcos{l oonr +{) {Al. D. i = 3.fircsitooar+{t {a). csu 21: Mdt con lic don trao dgng.vai c}1fi z s, o,6 *uq tri elao dgng cia nd, nguoi ta dtng m{t hg co hqc c6 hi{u sufi 209o vh cdng suii+ mw. cdng cte tpc can tara1,irgl?".r"ie- khi v4r n{ng di rir vi rri bi€n vd vi ki cin bing ii A" - 0,4 mJ. B. - 0,8 mJ. C.0,4 rnJ. D.0,8 mJ. c6u ?3: M$t con lic l0 xo dang dao d$ng di3u hiarheo phu!|s ngang. Khi vit n{ng c0a con l*c di qga vi tri cf;n b{ng thi n6 va ch4m "a.Omft varinrOt v{t nhd Cang ddg ye".?* i* A. hiOn dg dao dong cria conric tdng. I iSrsl,iu*c.{ro a-one.iu "on l** ,nng. c. ch* ki dao ddng cta ccn lic gi6m. Il, rin iii aanigng .,iutn Hc giirn. cffu 23; I*rdt bi6u lio sau day th gai? Tiong qua rrintr rtuyen ui dign nang di xa, cong suiihao phi A. ti ld voi bi$ phuong cOng suit nuyen di. B. ri 16 vsichieu diiduong diy raididn. ,:;|l,S,& . !. { li ogr'i1rr "*i J# l1,l-'*g d'en af grra hai oiu ddy d h?m ph& dien. Ci sljl-i-_:\ 7 o. ti I€ vdi thoigan n-uyBn di€n. ,i ,.r"$.W'"'- Cfiu 24: Eidu kign oii rhu dugc quang nhd vach hdp fig li -;^'o."' A.6p suitcria khdi khiphai rit ttip. B. nhi€t d0 cia d;trn khi hay hoi hdp thg phni cao hon nhigt db c*a ngu6n phdr quang ph6 lign ruc. C, khdng cin didu ki€n gi. "o-"-'r""-' r). nhi€t dd ctia ddrn khi hay hoi hdp thu phsi th{p hrn nhigt dg cria ngu6n phdt quang phd lien tgc. Si: 1,L,,Io:.thi \tg rnri.ng. bing.rhuv.tinh, gidi han bdi hai mrt .au io; gi6ng nhau ban krnh 30 cm. uret chidt sufit cta rhrlv rinh ddi vili ria d6 lh na = 1,50 vi O6i vOt tia tim li n, =i,5+. Khoang cdch giira ti6u didm d6i vdi tia ai va tieu itdm o;i ,iitt.i*;;ffi;il';;lu""' '" "' A. 1,92 cn. *,2,22cm. C. l,9Z mm. D. Z,?? mm. C$'26: Hai con tic do.n,,o::.u:"g,1:l: hd? *ii.::q.Tgt noi rr*n Trr{i S6t v$i crng mgt cu nang, Khdi lugag qui n{ng cia con lic thir nh6t lon gfp ua t<n6i lu'gng qui n6ng.,lu .on lnc rhi, hai {rnr = 3m:). ChiAu dli dfly treo con llc rhri nh{t bing mgt nri* chiiu dii dfiy rre o con ldc rhir hai ( ,, = I, Quan hi gita bi€n dd gdc cria haicon l6c Ii TRUNG HqC PIIO THONG CHL]YEN DI{ SPTiA NQI - TIII Ti{U I)AI ITQC LAN 2 NEM 20I3 Trang 3fr - lHs dA rhiJ5? S wu iim : http ://vuphan62 hn.violet.vn/ Page 3 A.q =1,5ar. B.q = ,{#o, C. a,=la, O. q =rfq. '3 V3' Cfiu 3?r D*t ffi*l di$n Sp u = 1?0$cos100x'r (V) vio hai diu m$t Ooan m4ch cS &L,C mic r', li Bidt R 50 ft , dd lf ch pha gifa di€n ip o hai diu doSn mach vi cucrng dd ddng C:0n lrong macl, , Cong su6t ti€u thr.i cua doan nrach li A. 86.4 W, B, 458 W. c. :16 W. D. 648 W. CSu 28: Dopn mgch clign xoay,chilu RLC mic ndi ti6p dang cd tinh cdm khr{ng. Khi ting din *r I crir dbng di€n thi he s0 cdng suAt cta m4ch .4- giim. i.ling O, C. t5ng, D. khOng d$i' CAu 29: Thyc hiQn thf nghigm l3ng vA giao thoa d*h sdng. Kha*ng e6ch gita hai kire II I mn, mln qur sdt dqr sang song vui ngt phaog.!,'ir hri khe vi cdch hai khe 2 m. Chiiiu sdng hai khe bing rlnh.sri: . tring cd f:r*c song 0"400 pnr S I < 0,?50 pm. Budc sdng lox nhit eia cdc birc xa cho vln t6i rgi didm \ tr€n min, cdch vdn lrung $m 12 m:n, l$ A.0,635 ;irn" B. 0,735 pm. C. 0,685 pm . D. 0,705 pn. Cf,u 30: illt nQt diqn dp ry = L/ocas{c}) , trong dd Ug khi-]ng dOi nhung o thay ddi durc* vic }rai tliu doan m4ch g6m dign tr*R = 60 O, cuQn cin thuinL vtr tr,r diQn C mic nffi *dp. Khi a= E thi cubng d$ ddng di€n hiQu dqng tong m4ch cgc dpi vi bing I*" Khi o* q hogc 4r = tr4thi cuong dQ rlirng diOn higu durrg rong mach bing n|au vI bing ! . Si6t E- a;=l 204 (rad/s). Gi6 t'i cila dQ tp cdm L bing "2 .fi A. :lt. 2tr r c. lls. 1- I B. :*I{. Ltt ' D. :H. t Ciu 31: Hai con lic dnn llrn bing hai hln bi cd h;trn kinir lring nhsu, treo tr*n hai *gi diy cd cung d$ dii. Hai h&n bi cd khdi lucrng khiic nhau. Hai con lic dat d6ng trCIng rn$t m0i truung vdi li dq gdc brn diu *,'.r nhau vi vin tdc ban di'; diu bing 0. Fhdr breu nI; slru ddy dung? A. BiBn dQ ctia hai con lic gi6m theo thoi gian vdi t5c d0 nhu nharr. $. Con lic nhg rnt d6n nhanh ho'n. C, Bi0n d9 cria con lic nhg gidm chgm hsn bi€n d$ *lia con lic n$ng. D. Csn l{c nqng t5c din nhanh hm. Cdu 32: Hai dao dgng diAu hoi cing phumg, eirng tAn sd cd phunng trinh x,=A,cos(rot-ff ta xr= Arcos{crtt-fi) c,n, Dao dgng tdng hqp cd phuoxg lrinh x = 9 cn*i*x+tp) crn. Ei biin d0 Ar c6 gi{ tri cr,rc dqi thi .4,1 cd gid trj A.9.,6cm. B. ?cm C.1816cm. D. 15.6rm. CSu.33: Lucmg ndng luq:rg rn} sring im \uy8n qua rtr$t dan vi dipn tich d{t vt$ng goc vdi phuong truyin trong mQt don vi thdi girn cd gid tri bdng A. d$ to c0a im. B, 11$ cao cta im. C. cr:bng dq dm. D. mrlc crcng dg 0m. CAu 34: Ihf nghigm giao thoa dnh sdng cd bu6c.sdng I hai khe I-Lng c{clr nhau 3 mm.Hipn hro.ng giao t}roa dugc quan sit r6n m6t nran song song vdi hai khe vi c{ch hgi irhe m$t khsang D. N6u ta dsi mhn ra xa thCm 0,6 ra rhi khoing vfin tang th€m O,te rnm. Budc sd,ng )" bing 4.0,a5 pm. 8.0,72" pm. C.0,60 gn. D.0,64 pm. Ciu 35: Chqn phdt bi6u drlng? , r';-; g A. Chi cd ddng di6n ba ph"a rnoi tso ra duoc rir rulng qnay. 4|.'iit1."I'S':I"'" ' B. Rdto cia dgng co khdng ddng b0 quay vdi tdc dQ gtic cia tt truong quay- ki"rir.td '" C. Vecto cim ung til crla tt trxottg q,tuy lu0n thay d6i cA vO hroxg lfin tri si5. -a/\:;'- TRU]'"IG FIOC PH6 THONG CI{UYSN OH SP H.I, NOI * THI TH*' DAI HqC I-iN ? NIM ?OI3 Trang 4ff - Mfi {} thi 35? S wu t dm : http ://vuphan62hn.violet.vn/ Page 4 n. T$c d$ g6c cira d$ng co liirdng d6ng bd pbg thu$c vin tdc dg quay cria tir tnrrng vl r*o momen cdn. CAu 36.1 Ch.on phdt bi€u drSng? A. Tia h6ng ngcgi vi tia tri ngoai cd ban chit khdc nhau. B. Chi cd tia h0ng {rgo?i IA c6 $c dung nhidt, cdn tia hr ngoai rhi kh6ng C, Tdn s6 cria tia hdng ngoqi lam hon t6n s6 c*a tia hr ngo4i. D. Tia hdng ngogi dd quan si4t giao thoa hon tia nr ngo4i. Cdu 37: Trong qud trlnh dao d$ng, chilu dil crla ccn lric lil xr: treo thing drlng bi6n rhi0n tri 30 crn ddn 50 cm. Khi ld xo cd chi€u dli 4O cm ttri A. pha dar: d$ng cia vflt b&ng 0. B, lgc hdi phuc tdc dung vio v$t b*ng vdi luc ddn hdi. C. gia tric cria v$l cyc dai. D. tdc d$ cila vft cgc dai. C0u 38: frong th{ nghifm l-ffng {Yaung} vA giaa thaa {nh siing, h*i khe cdch nhau 2 m-rn vh c$ch m}n quan sdt ? m. Dirng {nh s{ng don sic voi hu6c s$ng }" = 0,44 pm. Di6m M [€n m]n l] vdn t6i thf 5, c,{ch v6n sdng trung tAm m$t dogn li A. 1,64 mm" B. 1,98 mm t],2,20 mm" D.2,4? rnm. Ciu 39r Xdi Ui cpc cria m$t mdy phft di$n xoay chiSu mgt ptra (cd hai cpp cg{r t*) vio hai diu dqin mpi:h AB gdni diQn trd thuin R = 30Qrnic n6i ti;5p v6i cu$n cim thuin. bd qo, dign trd cdc cu6n ddy cta mdy phdt. Khi rOto cria nriy quay diu vsi tdcd$ 1500 vOng/phrit thi culng dQ ddng di6n higu dung trong doan mach li lA. Khi r0to cia mfy quay ddu vdi tdc dd 3000 vdng/phrir thi cuong dg dbng di$n hi*u dpng rong dopn mach li .fi A. ng h.r cArn cria cufir cim thuin l& A. 67,5 mH. B. 31,8 mH. C. 135 rnH. D,63,6 mll. CAu 40: Trong mgt dopn m4ch dign xoay chiAu RLC mic n6i fi6p, phft bidu nla sau diy dring? C0ng sudt di$n (kung bir*r) ti0u thu tr8n cA dc,an mach A. ludn beng t6ng cdng suAt tiOu thq u'6n cdc rli€n trd thuAn. B. chi phu thudc vir: gi6 tri difn tr* thuin R ctia rloSn npctr, . C. khdng phlr tliu$c gi vlo Lvh C. D. kh6ng thay ddi ndu ta mie th€m vir dopn m6ch mQt hr di8n hodc mdt cugn ddy thuin cim. It. PHAN ndnC : NI6i thi sinh ehi lim mgt trong. hai phinr phin A hoic phfin Il A. Theo chrmrg trinh Chufrn { lCI cf,un tir ef,u 4l d6n cau SO) - Cfiu 41: Nguoi ta phdn bi$t sdng 0m, udng hp im, sdng si0u f;m dpa trtn A. khi ning cAm thu cia tai nguoi. Il. bitn do dao. d6ng ciia chring. C. bdn ch6t v$t ly cia chring khiic nhru. D. toc d6 uuydn cia chring khic nhau. C6u 43: Mgrh dao d$ng dl$n tir LC duqc dilng lhm rn4ch chgn sdng cria mdy thrl v0 tuyiin. Khoing thoi gian.ngin ntr*t tir lrlc t9 diQn dang tich di$n cgc d{ dtin hic dign t{ch trer qr bing khCIng l& t. Tdc d0 truyin s6ng dign tu la 3.108 tm/s)" Sdng di$n tri dn mdy thu bit dugc cd bu6c sdng la - A,L=1.1S81. B.L=6.10sf. C.l.=9.108r. n.i"=tZ.tOtt, CSu 43: Cho ba dao d$ng diiu hba cilng phuong ctng tin sil ; xr = 6sin(l0lirt) crn; x, = 6Osin(lOra * &; ,r; xr = 6cos(l0zr) cm. + Dao dpng t6ng hgp cria ba dao d$ng trOn c6 phuong trinh: A. x=l2.fisin(l0lrr)cm. C. x=l2cos(l0zr+{lcm '2' S. x=1tus3{1Srt)cm. I). x = 6 Dsinit0zl + l) cm. '2' lnllNc Hgc pHd ruft.{c cHUygN EH sp Hi NOI - IHr'THu DAI HQC LAtq Z Nam ZOt I Trang Sfr - IvIfr de thi 35? Swu tdm: http://vuphan62hn.violet.vn/ Page 5 Ciu 441 Khi ndi vii dao dfng diAu hOa- phdt biAu nlo sau d6y ll dring? A. Ndng lugng cta vfit dao d$ng diiu hba khdng php rhu$c bi0n d6 dao d6ng. B, Khi m$t vit das d$ng di6u hda thi tgc dng hqp t{c dpng lOn v6t ludn huc,ng vi r,i tri ci,:, l C. Dac dQng *rla qon lic don luOn li dao d0ng tu da. O. Daa d$ng cta con lic Id xa lu0n ll dao d$ng ty d,r. d nhir t-ong *6i |.iru ki crir m6t v6r dao , , , CAu 45: Ti s0 gifra i6c d$ trurig binh lon nhdt vi nh' _ 3 hba lI -F -z c. ,i;. D. -,:. \) v3 CAu 46: Mqt mach chqn mic n6i ti6p gdm cu in diy thuin cam c6 d0lu ciim t-=*g, ru ditn ca . l0n dung C vh bi6n to R. I)4t vlo hai dAu do+n mpch m$t di$n 6p xo*y chiBu cil t*n s6 50 Hz v.1 di0n ; hifu dpng 20CV. Khi diAu chinh A,i ni6n trd It b6ng 40 O hogc 1S0 Sthi cdng sLrdt ti0u thu diin c dngn mgch rldu 11200 !y. Cid tricria di$n dung C lI ^. 2J3. , ^.1 L 11-s B. "6. tn{ n t" ll} 2n C :H. n. ?.:.1.f 'p1 xl D,315 nfs. D.8 m Cirt47: Eat diqn Ap u=lJJlcosar (vdi U vdar khdng q611 vag hai diudoqn nrach RLC khOng phirr nh{nli. Bi6t dg tg cim vA di$n dung duoc giii kh6ng A6i. Oieu chinir 1r[ sd ct}a R dd csng su6t ddu thu cfu dcgn mqchdqt cgc dgi. ffqi I ltr cuong dQ hi$u dr;ng cira dbng di$n trong mlch. hlhi d$ cdng sudt cria doqn mpch b5ng c. Sur. 2 n. €ul 2 C*u 48: M$leT thoa c6 tin,s6 dao d6ng ri€ng f = 900 Hz dit sdt mi6ng cia.rndt 6ng nghi€m hinh trr,r cao 1,2 m. nd Can nu6c vio 6ng nghifm, dt5n d0 cao 20 crn (so vdi r15y) thi thdy $m dugc khu6ch tlai rir n;rh. T6c dS mryin im irong kht::g khi l$. A. UI A. 353 rnls. 4.5 m. n. lur. B. 340 m/s. B. 6 rn. C.32? rr,-s. r 1n1 CAu 49: Mpch chqn s6ng cria rnQf n6y rhu girn m$t ty di6n vir cudn cam. Khi thu dugc s6ng dir;n tii cd budc sr5ng L, ngu,)i ta nh{n thdy k}roing th}i gian gita hai iin li€n ri€p di€n fp tr€n t1r cd, giri *[ bing giri tri difn dp hi{u dgng lh 5,l0'} s. nidt t6c d0 truy€n sdng <1iQn tir Ia 3.108 (rn/s}. Fuoc sdng X" Ih CSu 50: Trong rngt thi nghifrn, nguoi ta ch;du m$t chirm r{nh siing don sic song song hep v}a canh cta rnOt lang kinh cd g6c clri6t quang A= 80 theo phuong irri:rrg g6c voi mdt phing phin gidc cia g6c chiir qLrang. Chidt suit cir chit lhm lring kfnh (d6i r-oi 1ifi sdrtg dd) lI 1.65. Gdc lEch cria tir sdng ld A.5,?0. rJ. 6,3o. c.4n. D. ?,8o. B, Theo chumrg trinh Nfing cao ( 10 c$u, iir e$u 51. ttiln c$u 60) C6u 5l: Ph6t bi6u nlo sau df;y lh khdng,lung khi ndi vi nr6 men dffng lugng cia v*t rin quay quanh mgr trqrc c6 a;nnt A. Eon vi do mO mcn ddng luong lh kgm?/s, B. MS men d$ng luqmg cia v{t rin ti l0 vsi vin tOc g$c c*a nd. C. X6"tOng *d.1*.iojrr" tdc dgng ltn v$t r*n bingithCIng thi md nen dgng lugg crla vit r6n dugc bi.o tobn. D. Mfi inen d$ng lugng 1u0n cr\ng dfiu v6i v$n t$c gdc. CAu 52: Phdt bi6u niro ssi khi ndi vi momen qu6n tinh *iia mdt vr;t rin vdi ni$l hgc rluay xdc dlnh ? A. nlomen qudn tfnh cria m$t v|t r*n phlr thuQc vi tri tiuc quay. TRUNC HQC PHf} THONG CHUYFJ.{ FH SP HA NOI'- THI THU f]AI HqC L,{N 2 NiTN 2013 Trang 6fr - Mt il* ihi 357 Swu tfrm: http ://vuphan62hn.violet.vn/ Page 6 B. mornen qudn tinh cira mgt vpt i6n dic trung cho mirc qudn tinh cria vit rin trong chuyAn d$ng quty. - C. momen qr:{n t{nh cta mQt vqt nin cd thA fuong, cd ftB 6m tiy thu0c vlo chi}u quay crla v{t, D. Dan vi do momen qudn tinh li kgmr. CSu 53: Mgt rbng rqc k!6i luqng m, c$.trgq quay ci5 dinh nirn ngang qua tam diii xung. Iv{$t sgi d&y khong din, cd klr6i lugng khOngdring ki, dugc quin quanh rbng rgc, diu.cdn lli cua day gin voi vdi nh6 kh6i lugng irlZ. BS qua ma sdt d trpc quay vi sfc cdn kh6ng kh{. Gia t6c trong trudng g. Cia tdc vil n{ng khi duqc thicho chuyAn d$ng l} CSu 54: Cho mqt *dng ngang cd phuong trlnh sdng ta u = gcos2irf* -*l {mm) trong dd x tiinh bing \0,1 50 ) cm, t tinh bing gi6y. V{n rdc fuyin s6ng trong m$i truong ih h.*2. s.93. A.v=l0mls. B,v=2m/s A.l20N.m. B" 60 N.m. c.392. D.2d3" C,v=5m/S. D.v=3syrr. C.50 N.m D. 100 N.nt" c. /-*: v-u il8r C$u 55: Mqr bdnh xe cd bdn kinh R quay nhanh d&n dAu.ttr trgng th{i nghi r'&i gia tdc gdc 1. Oia r$c toin phAn cia mgr di€rn ftsn vinh bsnlixetei thd:i di$m t kA ru ldc b{nh xe b$t diu chuySn d$ng li t l f ; ] f ; A,, yttltt + y'z . B. yR{l+ 1rr c. /Rdl + Tf . D. yttll+ y''t' . Cig 56: M$t vgt r;n quay nhanh dAn d*u xung quanh m$t tru* cli dinh" Gdc rnb v$t quay <lugrc trnng khotng rhoi gian t k6 tt litc bat diu quay ti lg tluqn v6i I A, +. B. t. t- c. t?. D. .[. CAu S?l MSt bdnh xe cd momen qudn tfnh edi voi t4:c quay cd dinh 1A 6 kg.m?, *ong dirng ytn thi chiu rric dpng cia rnornen I[c kh6ng ddi M d6i vrii $qc quay dd. Sau 5 s, t6c d$ gdc cria bdnh xe li 100 rad/s. Bd qua mgi ma sdl nQ lan cria mnmen lyc M bi*g Ciu 58: M$t con 6c dcn, d6y trec dli l, dugc trec i?i noi cd gia tiic trong tftrimg g. Kdo ccn lic ra kh0i vi tri cen bing t6i li dd gdc a,.Tgi thdi di€m b*n diu. ngu*i ta lruyen cho qui ciu con lic vdn tdc 'r, theo phumrg vu6ng g6c voi soi diy, dd nS bit diu dao d$ng xung quanh vi td c$n bing . Bd qua mqi ma sdt. Khi qui ciu di qua vf trf can bing , vf,n tdc v cua nd cd d$ lim vf +2gI{1-cosq). B. v = {v,t + 6l(l-cosa,) . i? -rs,tl "J n. u = Jul * 2gl(l -cosa,). CSu 59: Mit con tic vfit Ii c6 n0 n:en qudn tinh n6i v*i hlrc quay h 3 kgm?. cd khoing c{ch tir trgng $m ddn t4rc quay lh 0,? m, dao d$ng tai no'i c6 gia dc rai tu ela g = rt imls?) vdri chu k'i *0ng Id ?,0 s. rh6i lus-ng crla con dc li A, 20 kg. B. l0 ke. C. 15 kg. D. 12,5 kg, C$p 601 Ti6ng cbi cria mgr 6 r0 cd tAn si5 f. O rS di rren duiili* thing vdi vdn t6r, u. Biiit vpn.t6c truyAn tun hong kh6ng kh{ ln v. Tin sii crla tiiing cbi 0 tS mh mdt ngu&i dfng cqnh dr#ng nghe thiy khi fl t0 titin lai gin mh ta lh A.f v '!r+l{ B. J uto v s. fl:t{. v *l-t:';'-:iN f!i:i.:rfr* r i. "'l,rL:"; ;l*,., * ;J /' l *a , e:.Irif^nlr_,_J ., TRUNG r{qc pHd TH$NC CHUYAN n}I sP HI N$I * THI T}1U EAI HQC tAN ? Ndm 2013 Trans 7s - m dl thi 357 Swu tfrm : http ://vuphan62hn.violet.vn/ Page 7 ?A.TIOXG T}IP? CHU1TN SAI HOC SLI THAM HA NOI BAr Aru sn xm rsu'p,{r H'oc x.r0ro *ir r* tr,An2{ng$y2"3-:grSl d. CAU E t3? il OE 209 ilE 35? Dn, 485 CA{J E r32 E r 2S9 Eil J)1 I C D r $ 3r A ts B ,j j] I (.: :. U ; L ;' U 1 (1 C,, It ?) A C A 1 tt D It !> 33 D C C* 4 B B D. C 3,1 D C C 5 B D B J5 B A D 6 n $ B B A 36 D n D ,| A C A. u 3? D T\ n I D D, A 38 D ,{ Br 9 t1 L) n B rJ t, 39 B A C 10 .t\ B B 40 D D A,o R tl C B ,{ 41 D A D TX, B 8,. t] 42 C C D* B l3 I A A. 43 B B B t4 A B A 44 D D B C 15 C D A I) 45 A 8,. B l6 C A C A .ld C g c B t7 (: C t- B 47 B A D. C 18 B A D 4S (\ A C A t9 B D n l, l-) 4t A B B' D 28 13 B A D 50 A il A F 2l D C A C 5l C A C C ,',, (l B Iz C t) n (: D ,.4 B D D C 53 D D Di 24 C A D n 54 B C C 25 D D B { 55 C C C C 26 T7 B D C 56 C C C l) 27 A C D s r B C 28 C D C 58 D 1) A A 29 D D n 59 B t- C A 30 D B A A 60 A A f' A S wu tfrm : http ://vunhan62hn.violet.vn/ Page B . C A 1 tt D It !> 33 D C C* 4 B B D. C 3,1 D C C 5 B D B J5 B A D 6 n $ B B A 36 D n D ,| A C A. u 3? D T n I D D, A 38 D ,{ Br 9 t1 L) n B rJ t, 39 B A C 10 .t B B 40 D D A,o R tl C B ,{ 41 D A D TX, B 8,. t] 42 C C. mhn ra xa thCm 0,6 ra rhi khoing vfin tang th€m O,te rnm. Budc sd,ng )" bing 4.0,a5 pm. 8. 0,7 2" pm. C. 0,6 0 gn. D. 0,6 4 pm. Ciu 35: Chqn phdt bi6u drlng? , r';-; g A rgi didm tr€n min, cdch vdn lrung $m 12 m:n, l$ A. 0,6 35 ;irn" B. 0,7 35 pm. C. 0,6 85 pm . D. 0,7 05 pn. Cf,u 30: illt nQt diqn dp ry = L/ocas{c}) , trong dd Ug khi-]ng