*E Ti'.{r, ?i' fti- t'il.[ Fi':,]'C r 1;1i'r? }.tT't = ']i].l| t l,.t-or: ti:l: i/4t Ii?. l;i:5i e Tizi'i gir-t;t iititt Lt'ii; 5'C phiti. !i'I3 !.Jaj tiil J/,/. t i Ho, t€n hoc sinh:., Trub'ng , :. SO Uao danh : Cdu 1: Theo thuydt tuong d6i(lpp) tni phd,t bi6u nio sau tidy sai? A. khdng gian c6 tfnh chdt tuarg d6i,phu thuQc vAo hQ quy chidu. B. d6ng h,5 chuydn <i6ng cAng nhanh chay c2urg ch4rn. C. khdi lugng cua vat ii nh6 nhai khi vdt di'ng y€n. . @'. fO. d9 rlnh sdng lu6n kh6ng d6i c ;300 000 km/s vi li t6c d6 ldn nhft tiong tLr nhi3n. C6u 2: MQt ngudn ph6ng x4 titnu c6 dQ ph6ng x? H : l0 Ci. T'inh kh6i luo,ng crha m5u. Cho bi6t Ra c6 chu ky bdn rfl li T = 3,7 ngdLy. ,\ .d. 3,65.10-5 g B. 3,55.10-6 g. c. 6,35.10-6 g. (c) o,;s.to-' g. Ciu 3: Trong thi nghigm iang vt giao thca inh sang, cd.c kJre S1 v?r 52 duoc chi\il's6ng boi hai ilnh sdng dcar sic /" y : 0,64 gm vd l,2 : 0,48 pm. K-hoang cdch gifra hai khe ld a: 2 mm. Khodng cach tu m4r' phang.chri'a hai khe vA miin quan sdt id D = 2 m. Khoang cdch tu vAn sdng tlung t6.m ddn vdn s6ng cr)ng miu gin n6 nhit 1A A. 3,84 mm. ts. 8,14 mm. C. I 1,5 nim. lFtJ 1,92 mm. Cau +, frt.ai .o" f i. uat f y d3o ofng.didu h,la trong rnlt phing thing cifing quanti-m6t h.uc ni,n ngang r,6i chu k!'T:-0,5 s Bi5rv9t rir, c6 k,iiii lugng rn = 1,: lrg vd morlen qurin tinh cua n6 Oiii vei trgc quay liL 't : 9,49.J0f, kgmz. Tinh khoALng cdch tu trgc quay a€n kir6i t6m uira con lic. Ldy g = 10 mls2. b.'9,99 " 8.9,8 cm. C. 8,9 cm. D. 11,02 cm. CAu 5: Bi6t hing s5 llang lt=6,625.10-34J.s va dQ ldn cira dign tich nguy€n td la i,5.i0-19C. i<irl nguy€n tir hidi6 chuy6n tir 1r4ng thdi dimg c6 ndng lug'ng - 1,514eV sang tr4ng thdi drmg c6 ain-e ltrong -3,407eY thi nguy6n tii phdt ra bric x4 c6 tin s6 A.2,57L 1013H2. b 4,572.101aH2. c. 3,879.10raH2. E. l: Ioleol C.1= aloe d $a,s+z.tal2riz .,] n r- ^.i - t.) !-',-L): { Ciu 6; Tia trJr ngo4i khdng -4,. bi thuy,tinh,T,j:. h.ap th'rr. ,gt ca lac dung cnleu sang. -C. duoc ph6t ra tir cdc v4t ciugc nung n6ng.ci€n rrdn 2000cC. D. kich thich sg ph6t quang cria nhi6u chdt. C6u 7: Chgn ph6t bi€u sai khi n6i vA anh hu'dng crja ina sdt l6n cd.c dac tiQng A. Ma set chinh ii nguy€n nhAn ldni tit mQt dao d0ng. @. K'ni c6 luc ma sdt tdc dgng, dao dQng cria hp vin dugc coi ldi dao dQng iir do. C. Dinh cOng hu,:ng cdng cao n€u ma s6lcira m6i L"ucng cing nh6. D. Khdng phii loai ma sit nio cfing ldm giAm co ndng vi lirn tat dAn dao ddng. C6u 8: lvlqt 6ng Ronghen phdt ia birc x4 c6 budc s6ng ngin nhdt ld 5,87.10'rr m. Bi6t e -1,6.10-19C , . = 3. I 08 m/s vi h : 6,6?5 .10-34 J., . Bo qua dQng ndng ban diu cira €lectr6n. Hieu diqn thii gi[-a an6t ve cat6t cira 6ng ld A.2,00kv. {8.2,15kV. C.21,15kV. D.20,00kV. CAu 9: Trong dao dgng di€n tu tgYo c[a m4ch dao d6ng LC A. diqn tich bi6n d6i cung pha voi ddng diQn. B. dign tich bi6n d6i ngugc pha vdi dong diQn. C. eiiQn tich ch?m pha r12 so vsi trir tru'dng B. ' D. di$n tich nhanh pha x12 so v6i tir truong B. Ciu 10: Cucmg dd chirm sdng dor sdc khi truy€n qua m6i truong hAp thr,r dugc x6c r5inh boi cdng thirc nAo sdu dAy? Trong d6 I0 le cuong d6 cira chirrn sdng tdi m6i trulng, d la a'6 diLi ducrng di cria tia sdng, ct 1d h€ sd hdp thr,: cLia m6i tru&ng ^.) r gU A. l=lo9 \ Ciu lii: tiqr thAr ;;tfU Ui€n A,iittii.ntr irqi nirAn i;teiiirismuih) oo ph6ng xa .{. cr- . b. P- C' + vii 1'' P' g-' Ci,t;- xZ:Pir!,i bi€u n2Lo sau ciA;' sa1 oi apng co d-iQn xoay chiiu 3 pha? '\ ' i Tu irudrg quay c&a riQng co cio h? iii6ng cidng diQn 3 pha tao ra' iB. Reto quay cDng chiAu v6i it'trrid'ng v2r c6 toc ii6 bing tAn s6 g6c cira ddrrg diQn ba pha. "C. R6to quay c*uoc lir dc nrornen h,rc cria tr)'trudng quay idc dpng' D. c6ng tudt "o do rlQng co sinh i'a lu6n nho hon c6ng sudt cLla 3 cu6n ddy cira siato. ciu.i3: lviQr con ldc ld xo ciang ctao dQng clieu lipa tr€n mlt nr4t phang ngang. Khi gia t6c crja vflt bing i.h6rrs thi A. thd nang dirn trdi aat cuc. d4i. E, vft dao dQng lech *u nt.tAt io v5i vi tri cdn bing' C. vAn t6c crla vat dao dQng nho nhdt'. 6l dOne ndng c[a v4t lmi nltAt- CAu ffi ViO,-**ia"o aOng di€n tu t-Lr do gbm n:6t cuQn cd'm thuin c6 dQ tir cim L : 1,25 mH vi tp diQn Jaig" dung C. O m6r iirbi ai6rn cuimg dQ ddng diQn irong m4ch li i :5 ccs(1000nt + nl2,\ (mJ'). Ndne iusng di€n tir trong m4ch vd di€n dung cira tp di€n ld "@fi:22,5ni;C:B0prF. ts'w=45 ptJ;C=80pF' E,w:4,5nJ;c:4oopF. B'w:4,5 PJ;c:4oPF' C4u 15: Trong thi nghigm lang vi giao thoa vdi 6nh s6ng iring, thAy o trSn mdn quan sit A' mQt vin in2ru d cl^rinh giira' E. hai b€n v6.n-trung tAm*c6 nhfing ddJ miru nh'.r mAu "iu ubng, dd o trong tfm d ngoAi- dC. mgt dai s{ng mdu d chinh gi['a- ! . . . ,. D. cirng xa varltrung tdm cfc diLi sdng miru cdng m_d din vd.kh6.ng cdn thAy c6c khoAng t6i. c6u i6: rvr4ch dien ;; :hil ;il;O; aign ,ro thuL R:'ic ndi tiap voi mQt cuQn ddv thuin cim. Khi hiQu dien the cDa m4ch riign ia u = i20./7c.,s (i 00irr + n I 6) ("') thi ding diin i = 2cos(100nt - n I l2j A. Ei€n trd R c6 gia tri le A. 120 o. r@Joo o. c' 8s Q' D' l9o f2' CAu 17: ivtqt phdton c6 budc s6ng 1", ning luong e thl c6Aong l-ugng p vn kh6i lugig m ld A- p = hciL; m = h,./1". ts.p: e lc2;n= elc. @p: h/1,;m= h/c]'. D. p= e/h; m: I/e)" C6u iB: D4r ve,o hai diu do?n mach RLC kli6ng phin nhAnh nrQt hiQu dipn thd xoay chiAu u=Uocos(art-d3)thiddngCi€ntrongmgchlii=Iocos(art-rl6).Eo4nmqchniyluonc6: A. Z, = g. '@l zt. zr. C. Zt-: Zc' D' Zr-> Zc' C6u 19: iviQr b6nh xe Uit Ciu qiuy qu"ni, trgc c,i,J!nh c',la n6 cd phucng trinh 'f =0,5t'(red;s). EiAm r +-a ,Arhhirhveqn*?sc6vAn t-dcy=2tds.Qia.t0ctodLnphAncriadi6mAkhid6c6giStri ri liCrt V<!ui Ue'ur nv J(s e J vv /*'r -"- ' ._' A.a:8,25mis2- w-u: ii mis'' C'a= +J1 ntts'' - D'a:2'85m/s?" c6ur 20: Tru.orng hgp niro sau ddy m4ch cii6n xoay chiau 116."-g ti6u thg cong suft do ngu6n cung cdp? it ^ '^i i n ts. fuIach RL. /f!. tvr4utl uv' -r' V. Vtacir RC. S ivtrytr RLC khi c6 cdng huong. ca,, zi,-prra,iiAu nao sau dAy iiL sai vA hiCn tugng phi't fiang? A 6ntr s6ng phdl quang c6 bu6c s6ng ddi hon bu6c s6ng crla iinh s6ng kich thich. e. m6i ch6t phet quang c6 mQt quang ph.o dal tl*g r- ^h.ii ^,rrnc, ri "," -1.+ sArs cia rngt s6 chit khi bi kich thich boi dnh s6ng c6 budc s6ng ngan. -L. yira! Yu4r5 's r:' rgb' 6. tuu khi ngimg kich thich sg phdt quang c0ng s€ ngimg' r c6u {2, i"r.hd;l# Jao dQr,g ai'Au iroa aqc tir"o trai riuong thing song song, c4nh nhau vsi cirng biSn +r r.i- -a :.ti +,.! ^a- hi.o "i'o-"hi'.o cni nhrr trilns nhau. O m6t thdi didm hai chit di€m di ngang qua uu !4 !4r nhau, nguqc chiiu t*i v! tri c6.li d0 ld *= -Ji N2.DQ iQch pha cira hai dao dQng la A. 1T. - E-2n13. C' nl3' D' rcl2' CAu 23: Dat vAo hai tiiu doq.n m4ch RLC kh6ng phan nhdnh m9t higu dign thi5 xoay chiAu c6 tan s6 f = 50 ha rrieu aignltr6 rrieu igng u = const. Biciaign tro thuAn R : 120 Q , cuQn ddy cdm thuAn c6 hq ,A * "# f.irlng joi. Oilu .trintr ec aien dung cira 4r diQn dcn giA tri C : 40/ll pF thi Us: max. Ta c6 A.L:9/10n(H). B.L= l/n(H). c.L:12ll0n(H). D.L:iali0r(H). lt CAyq :iti: Ci'::iitar,,-1;.iane rji€ii cila ri:61 i'-ii': icai ciirlg ii:-,, c,:i.4i cira i€ bd,r qLra;ig iiiiir phtr'cii:-iQi i;it; $;" 'x.n:hi.t c'la l:im lcai n=i, .,'i busc sc,itg c[ra dirh siing ] i,:li lirich. //x- ffi, cing ihaai c'ia lrir; tcai c. C. cu'0,-,g dd vA budc s6ng cria /airir s'inE i:ich ihich. \4 )T. ,ii ;r truu-ng git'a an6i ".,i catdi ciia i€ bao quang dign. Ci,u 25:l'hio chi€u tir tia h6ng ngo4! ci6n tia F.onghen cria tharrg si'ng cii0n ir)'ihi A. bud'c scng giir',r ciin, ning luc.'irg ciha cdc phOton cirng giAm din. ts. budc s .rig idng cidn, nZng lu-orig cira cdc phe,i6n cilng tdng ciAn. C. iinh chAt s6ng rd ndt dan, tinl chdt hAt rnd ddn. <D. tinh ch6.t s6ng rnd'dAn, tinh chdt hat rO ndt dan. Cdu 26: I{6t s6ng rlgane lan truy-An tr€n m{t nuo'c c6 phuong tlinhx:5 cosn(O,2t- 0,4x) (cm; s), x li khodng cdch tdi ngu6n s6ng. Trong th&i gian 120 s s6iig niy truy€n di duoc qudng durcmg li A. 19 cm. B;' 12 cm. (C.60 cm. D. 68 cm. A. 110 V. E. 112 V. c. 155 V. D. i08 v. CAil27: CuQn so c6p cira mdt miLy bi6n th5 c6 -50 vdng ddy vi hiEu diEn thC hieu dirng bing 40 V. lihi diu gugn th.u cip de ho'c6 hiQu diqn the higu dr,rng bingl?0 V. Ctrgii thfr cdp c6 @)ntlieu hcrn cudn so "dp i00 vong. @9. it hon cuQn so cAp 100lidng. C. it hmi cuQn so cAp 3C vdng. D. nhi6u hoa cuQn so c5.p 50 vdng. Cdu 28: Quan sdt th6y s6ng dimg tr6n ia6i soi dAy r:'in iiiii nai dAu cd dlnh duqc cang theo phucng ngang. ' ': i ' ' '" I s6 bqng s6ng trong CiSu kiqn vdn t6c truyAn s6ng kJr6ng r:',ii tu ci-n -'" *ilt'ifitil-:6"H iln?o"lu"l'"t rrons cre ts. tdns,a" ,d'l:;l;'i4 . * *'" S tang tdn so ltn gAp doi. D. giam tin s0 di l6n 1,5 lan. Ciu ?i: Buoc s6ng cfa sOng diQn tu cua ld ,ris6ng ld l2 cm. Cho c = 3.108 m/s. Chu 1'7 vi tin s5 srSng lir ^ +.tottq 2s.10;Hr. ' @ +.t0''o s;2500]\tlhz. C. 4. l0'r2 s; 25.10'0 F{2. D. 4.10'e s; 250 Mhz. Ciu 30: Cho m.ach cii€n xoay chiAu kh6ng phAn nhdnh RLC. D+t,iiro giil'a hai dAu rioan m4ch m6t hi$u diqn thii u : i00 8 cosi00 7Tt (V), C6ng suAt tiSu thu P : 100 W. Ddng cii$n nhanl'i pha hcm hi€u diqn th5 m6t g6c n l q . eiethiQu ciiQn th5 gifi'a hai diu cuon cam li 50.,0 flf . Dign dung C cria tg di€n li: A, 26,38 F. 8.2.rc41lTF. g)to"tnr D.4.ro-4lr F. CAu 31 : l4Qt vdt rin c6 th6 quay xung quanh mQt trgc cildlnh xuy0n qua v4t. N€u hai lgc tdc dgng l€n vit rin c6 mcrnen th6a mzn aiALikien F'd1 : F2cl2 thi v?t rin $ a"ng.yen ho{c quay.diu. B. co. thA quay chgrn clin dAu. . i. cO the q*ay nhanh din riAu. D. tiep tqc dring ydn n6u lfic diu dirng y6n. Cdu 32: Chi6u mQt b&c xa c6 biirc s6ng ). = 0,32 prn vi catolcrla mQt tii bdio quang dign c6 c6ng thodt A = 3,88 eV. V4n t6c ban diu cgqd4i cria quang electron lir A. 3,7i.105 rus. (9.)zo,gg km/s. C. 5,2.1C" m/s. D.3,75lc'llis. ^- .,r '\-/' {_au JJ: Ve SOng alx /^A. Cac s6ng co khdng gAy cdm gi6c Am kh6ng duoc gqi li s5ng dm. E. Ngudng nghe kh6rrg phg thuQc tuy€n tinh vdo tdn s6 cria dm. C. O6 thi auo Agng am cila tiilng mdy bay plidn luc ld nh['ng du]ng cong tuAn hodn. D. Niiu het idt khg thi d6 cao c'ia dm gilirn. CGu 34: A, lvl vir B theo thii- tg li' 3 di6m trdn mQt doan m4ch xoay chiSu khdng phdn nh6nh. Hieu dign thd trdn c6c doqn mach nho AM vi MB lin luot li uay = 60 cos crl t (D va uMB = 100cos( r-D t + n /6) (V). ., 'i.^ HiQu di3n thd higu dqng gita hai di8m A vdL B ld CAu 35r lvlQt con l6c dcn dugc treo vio trin cia m.Qt xe 6 td dang chuy6n dgng theo phuong ngang. Chu kj, dao dQng cia con 16c dc/n khi xe chuySn thing o'du la Tr, khi xe chuy6n ciQng nhanh din dAu vai gia t6c a ld t. va thi xe chuydn ci6ng ch{m dAn ddu vdi gia tiSc a ld T:. Ta c6 ,d. Tz: T: >Tr. E.Tz:Ta<Tr. C.Tz<T,<T:. D.Tz>Tr>T:. Ciu 36: C6ban iiCofa chdt ph6ng x4 B- cdchu kj' bdn rd T : 5,27 ndm. Hdi sau bao lau thi 25% kh6i lugng cira mQt rndu ctrAt iiCo phdn ra h6t? A. i 0,54 ndm. E. 1 1,54 nam. g 2]9 ndm. D. 9,i2 nam. , Cdu 37: tviQt chi6c xe ch4y vdl tdc d0 54 km/h, hti6'ng vEphia v6ch tuong dd cao. Xe rri mQt hOi cOi vdi t, tin s,5 t200 Hz. Hdi tr€n xe Ranleat-V-4n nghe duo-d'ti6ng cdi phin xq tI vilch dd vditin s6 bao nhi0u? BiSt t6c ci6 truyln an trong ti tjrg Ci i"150-m/s. \ - .A. I ,3 1 lcHz. ts. 1, i2 l*lz. C. 1"51 kHz D. I ,-13 kl''{z- \ 'l-'itr :jl.lt! icii c'lia ini't lili iirii: , ! Qipiro 1l1ai1c vic iri.ng irg:rg li,3.n r€t vi. sb r,.r"rcleorr ciia i-rgt liiiit cii. ilpf,t-r tiruQc vii: .jig:i iicir h4t niriri vd riii i-:trt l:ir6i ctra. ii.1.t lliiil ci,5. C, pirg thu6c hoi.ir ici.n'.'i ,-i nZrirg luo-i-rg iiSrj !:l;t cila ir4t nhi,n rJ'1' t-1. i<h.3ng phi; ihuric vio s5 khAi c'ia h1t nhdn. Ciu 3g: icni tln s,i g6c cta dong drQn >;oay chi6u ii ot thi c6ng suit titu thLr cita cudtt d2.y c6 dQ t-ii cirnr I- vl riiQn tro.tl,uin n t*. f,. i.i€u nOi tjdp cuQn cidy v6'i mQt tq di$n c6 di€n ,fting C v6i ZCLco2: I thi c6ng suat ii€u thu cr.ia do3n m4ch ld P1' Ta c6 A. Pr : Pz. ts. Pr : J1p ' C. Pz : 2Pr- D. Pr : zPz' CAu 40: lv{Qt ihaiih chidu dii L dr.nrg ciring bi d6, coi ntru chAn cila thauh kh6ng b! truo-t. Thanh c6 khdi ^ , .a -: tugng pnan Do c€u va c6 rnomen qudn tinh ciiii uO'i tr!r. quay o'i qua,chdn cEtld t : ML2l3, M ie khdi tuqn! "[u cQr. Ggi 0 li g6c gi['a thanh vd'i phuong thing riwrg Hdj d€n g6c 0 nAo thi gia t5c ti6p tuydn c,ia mQt di6rn o o'iu tr€n ctra tnann bing mgt hira gia t6c roi t1r do g? ' A.sinO:1/3. E.sinO:ii2. C.sin0:1/4. D'sin0: UJt' C6u 4i: M3t rioan m4ch xoay chi€u RLC kh6ng phdn nlidnh dang c6 clung khdng nho hcrn cdm kii6ng. DE xdy rahien tucmg cQng hu6'ng trtn m4ch cdn v^ - A. tang hu sii tr;- cam cria cuQn ddy. r'ts. ginm diQn dung cua tu dig*. C.tang tin s6 crla dong dign. D. tdng diQn tro thuin. C6u 42: ir4u6n quang ph6 vach cria nguy€n tri' hydr6 chi ph6t ra 3 v4ch thi phAi kich thfch nguydn tu' hvcird d{n mirc ndn-g lugng cr}a qu! dao dtmg ' iit r.ri. B. N. c" o. D. P- Cau +S:-ira.OictAt Aiem dao dQng <iiAu hda c6 phrro'ng trinh x:4 cos(4rct + a/6) (cm; s)' Sau 2,25 gi6,y kd tri i6c bit o|u kh6,o sdi dao ciQng, chAt diSm di qua vi tri c6 li d0 x. : - 2 cm A.7 lin. ts.9 iin. C' 8 idn. D. iB ldn. ^ t 1- n: - ,+i^^ ,-i ^,"- ^.\-a -A+ ".ra. iA {,4 U !t{: Uiae (!UllE, Yl vuo lqrrb rr^Y! -trbsJ Y^ rY A. c6 cuiig s6 nucleon vir s6 ncrtrdn' ts. c6 cdc tinh ch6t vat l9 vn h6a hqc tr-hu nhau' C. c6 th6 thuQc loei bEn- ho4-c kh6ngbAn (ph6ne xil' D. c6 cung nguydn tu s6 nhu'ng cO sii ttroi gi0ng nhau' Cia; 45: Tr.€;: iiiii ,,,rj "O hai nguin leng itit irq;, 3, r;2i 52 dao riQng c'irr:g :iii sO f : 15 Hz vi ctr;g pha' iai,jicrn h4 c6ch ngubn Sl khod:ng dr :30 cm vir c6ch ngu6n 32 khoing d2: 18,5 cm s6ng c6 biOn dd cqc iiai. Cig.a M vd trung t1;c ctra SrSl c6 ba dud'ng cgc d?.i kh6c. Tinh v4n t6c truyAn s6ng tr8n rnlt nu6c. A. 61,3 qrr/s. ts. 16,9 cm/s. C' 54 cm/s' D' 46 cm/s' Cdu 46: S6ng diqn tu vir s6ng co A. truyEn duoc trong chin khdng' ,b. OiigG a?'0 Uiilrlii UUi l!r- iltrii i\!' Ei:uc vsv i'*! vuq C. cO taricirdt u4 i9 iihdc nhau ni:tmg c6 quy lu4-i biSn d6i gi6r'g nl':au. . . D. dbu la cic qui trjnh lan truyen ndng lucng-nhLmg chi c6 s6ng co gi"y 6p sudt. c6u 47: Chidu mot uo" "a c6 ]. = Q,3 pnr v2ro catSt cira mot t6 bdo quang <lien thi dugc m$t ddng quang rji€n bdo hoa- c6ng su6t c,ia ngudn bfrc x4la 3 w. Gii sri cii' i00 ph0tOn.toi aap vdo cat6t'rhi lim but ra m6t eiectron (hipuiuat lug.ng tr i%). cum.rg dQ dong quang diQn bio hda ld A. 6,5 mA. B. ?,25 mA. C' 6 mA' D' B mA' CAu 4g: X6t m6t vdt rin c6 rr,;c quuy .ti dlnh xuy€n qua vf.t. Moi chdt di€m cila vat dn kh6ng thudc truc quay o cirng mQt thsi .iiAm n" co cung ri6ng ndng quay 'ra oilrg iiiofien 'iong l'igng' 8" kh6ng c6 cring t6c dd g6c vi gia t6c g6c' c. c6 cGg "3n l:" ddi n6u c6 .".1t $1T,qi"":l'::l.g':.:'l u" co cung Luc g9 guu, Bld lu! gur tlrru\rrE NrurrS wv w(r'r6 5vv tlsqJ ' CAu 49: M6t con lic ld *o duo d$ng die\oa dqc theo truc * l+* ngang c6 Aglg.la.ng cgc d?i li ;;": S i. l-a xo c6 dQ crmg k :-16,2 N/nn. lri.c dQng ndng bang th€ ndng cua con ldc thi h,tc k€o v€ t6c artfi fe" vAt dao dQng co eidlri bing t\. A. :,ZS N. E. 8,1 N' '\. 9'3 N" D' 9 N' C6u 50: MQt v4r nho rham gia dbng thoi hai dao dQng diAu hoa cing pllucmg x1 : 4 sin(nt + 0 ) (cm; s) vA f: i ' - rr .L: L: - .+A ,I^^ JA-^ xr: q-J3 cosat (cm; s). Vdi gi6 tr! nAo cira 0 thi biBn d0 dao dQng cfia t'4t nhd nh6t? A. Q=-r/2. E. O=n/2. C' 0=x/4. D. 0=n' UET TRIJONG TFTPT EAO DUl'TLI - liANoi A. cr. B.B* trong m4ch vi di€n dung cria t-u di-en h A. W = 22.5 nJ; C: 80FF. C. W: 4,5 nJ;C:400[F. nAp Aro ps rm rnlt DAI r{qc ryAh'I 2009 - BqT s FI$n thi: I/At li' kii6i A Thdi gian ldm bdi: 90 Philt. PIe daj thi 511 Cdu 1: Hat nhAn lltfi, UiOn aOitnanh hat nhAn lltei 6ismuth) do ph6ng x4 C. avi y. p.!_. EA: Phumg trinh phdng xg: ll'fU -+ll' ni+-i e = Chsn D' cdu 2:MQt ccn lic ld xo dang dao dQng di€u h6a tron mQi mg.t phu"g ngang. Khi gia t5c cria v4t bing khdng thi -4 thd ndng dan hAi dat cuc dai. E. vAt dao dQng i$ch :iu nttAt so vdi vi tr-i cAn bing' C. v4n t6c cria vft dao dgng nh6 nhit. D. d6oe niiie ctia vie l&o Phit. ! - ^ - : sA: K-hi vir di q*n .,.t ffi?* uEffihi gia tdc c&a vit bang khdng. Khi d6 vgn t6c c&a vQt d?t cgc d4i n3r dQng ndng cfia v$t l6'n nUAt. + Chqn D. Cdu 31Ni6t mach ciao dQng dien ru tri do gdm mQt cuOn cim thuin c6 d0 t.u cim L : 1,25 mH vA tu dien cc c'iQn d""gC Om6tthdidir-lm"i*gd0dlngdgntrongmachlii =6cos(l000nt+ n12)(nA).NingluqrngdiQntu B. W = 45 pJ,C: 80pF. D.W= 4,5 1:.1;C:40P.F. EA: Fidng lwg.mg diQn tir rrong naSch: Wu,co-* = (11 ;1'n'1. = (1/ 2).1,,25.1CI-3.6.10-3 = ?2,5'10-e(J) = Chgn A. CAu 4: Trong thi nghi€m Idng vA giao thoa voi 6nh s6ng tring, thAy o hen mdn quan s6t A. mQt vdn mAu d chinh gita. B. hai b€n vin fruns tem;6 nhfrng clii miu nhu mdu ciu v6ng, d6 o'trong tim o ngodri' C. mQt diii sdng miru 6 chinh gita- ;e* ;;;;;;; ?; re; J "ei *e'-* dou sic ir.ong 6nh sang tring dlu cho 'ran sdng. tqi vi tri vel jrulq_tar-c f i J- a, L-^^- ldlu ru4q f,r As;r \ v. E4 + van irung tim .6 ;;;;i"S E;i ba- van tiung tari co oaJoal sSng.cri lau nn,l eiu vdng, ti*.e *"o19 < 1PD - " dii nhv ci'ns m& ri hiim chdng l6p nhaal ndn d6 o, ngoii, eing ra xa v,am tnung tam, c6c d6i niy cirng m6' r$mg , nnd dim vi c6 p gifra cde dii khdng c6 cdc khoing t6i. = Chqn D' ciu 5: ivl4ch dign xoay chiAu gdm mQt di€n tro thuin R mic noi ti€p vdi mQt cuQn day thuin cam. Khi hi€u dipn , i ,. u=t20.,Dccs(100nt+n/6) CV)thiddngdiQn i=2cos(100rd n112)A. EiQntroRco the cua macn ol9n la gi6 tri li A. 120 o. E.5o q c. 85 f)' T] DA:Z=l=60J2(O); r 1.0 D. 190 Q. n / 7t) fi R 1nl/\\ - -L^-D DQ lQch pha gifra u vir i lli: q =;-l -; I l; costg =.:+ R = Z.cosrp = 60(91) = Chqn B "'*'Y 6 ( Lz) 4' z C6u d: lvl6t vat rin.c6 th6 quay xung quanh.moJ truc .a ainn xuy€n qua vQt. N6u hai luc tdc dr,rng l€n vdt rin c6 momen th6a mdn di€u ki€n Frdr.= F2d2 thiv{t rdn . . i A. ,1lng y€n hoac quay ddu. E. c6 thd quay chAm dAn tidu , ' C.c6th5qua,vnhanhiAndeu.D'ti6ptr.icr1rrng iiiili.'l1.l.]]:.'= IDA; Ch[ Ui6t man fimonnen fiqrc-co d6.loil himg.urhau, m6u-hai rnonnem flryc co t6c d.'r-nng lhna q'r'iay c&ng-chidu' ]<hi o6 vgt s6 quay nhamh din diu; Nl5,* gra imi6o ";re:ry.Tg eldur [A ***** c6m^thi.[r6rt crp'c sd dirug [4i! m.u c6 t6c d0 ham dffei va ch6ng kJnang ph6i rfloncsem *aJse aol cunau vd quay mhanh diim dd,un. Khn hai rnorrnen lunc "?'*llj'ffd; &y "{*r9." ch-i6u nha,u, tr&i d6 chrhog sd triQt ti€u tic dsng cfia niaeu v}r vat iao$c iilfrmg v€n ho{c quay d6u. = Chgn C. .C6u T: Chi6u m6t br?c x4 c6 bric s6ng 1" = 0,32;rm vd catot cita mQt t€ bio quang dign c6 c6ng tho6t A = 3'88eV' Va" tO. ban dAu cgc d4i cira quang electron li ' - ^K v +Ir LUv uqr j;.rt ; {.za,g6k,r/s C. 6,2.i06 m/s. D.3,75 km/s. Sd: Ap dgng cdng thrfrc Anhstanh cho hi{n twqng quang diQn cfia kim lo4i: 2 hf :E: A+W,^ " = A+g+t*?y0."" ;28r96km/s. [N6u "c6ging" t{nh "chinh xic"theom6y tin}t -^ I " domar z s6 c6 k6t qua 25408,75(rn / s) ; 25,4(km i si \n khoi tueiig :ti ltei *1;dt nh6' thav a6A nuo cfra ndng u""uu*"u* aa* aa* iu*y aal i"u,e t e c&a vgir tdc. Kh6ng phii v6 tinh cic kft que $, c, D *h6c xa so vo'i E' I = Chqm B. CAu E: VA s6ng 6m ts. Neu6ne nghe kh6ng F'hEI,thu6c tqyen tinh y cong tuAn hoin' D. N;5u hat rAt khc thi dQ cao cria im giim' r rrA. S,imo 6r" ti s6no ertr" Ed cao ",iu a*"eUrl thuQc vio ti,rr.6 e*. E$ to cfra ffm phg thuQc vho culng d$ vri' ruu' +i: i+ ,";=ail.ilr=r6- *r4ilu"i'a* "i; timh tuAn hohn. Ngiro'og ngne cua *0-'.aTrin.*ji ie.i nh6 ffm. Sd thg dao d$ni nh6t qL-;" ) crla ml?l "*a*g dO a;qe i* ilay c6 th5 gfi-y d-u-oe cim gi6c Ary:hY iai nguli' SA thlc&a L*;o theo tAm s6 f,cria 6um (rnamg 94 sGK iz *a*g **o) la ildt aurtvmc coJg n6m dfiy khdng phii Ii ueQt quan h$ tuydn tinh. :+ Chqn B" cfru 9: A, M vi B theo rhi, q ld 3 di6rn tr€n mgt do?n m4ch xoay chi6u kh6ng phdn nhanh' Hieu diQn th€ tr€n c6c rto4n m4ch oh6 #o[ ra G ia" luqt li ";= ib "orot CV) vi u** : lOOcos(crt t+ n16) CD' Hi€u di€n thd hieu dung gita hai ttiiim A vi B li a.llg-}L E. 1l2V' c' lss v' D' 108V' SA: Ei6u di6u c6c hiQu diQn tu6 bing v'6cts quay nhw binh b0n' Ta c6: ulu = ul* + ut*u + Z'uo* 'u*" 'ccs(n 16) + un" i 1i0(vj + Chqn A U; C-Au 10: MQt con tic ci*, dugc treo vAo n^Arr cfia m6t xe 6 td o'ang chuy6n dQng iheo phuong ngTg' Chu kj' dao d6ne cria con rdc d* khl';;;;6; "i";;t- ia r,, khi xe chuvei dOng nhanh din tidu v6i gia t6c a !i rz vd khi ;;-;i"t6" dQng cham din diu voi gia toc a ia T3' Ta c6 A T.:T.>T, E.TI=T'<T; C'TZ<TT<TI' D'TZ>TT>TT' DA: Khi xe chuydn dQng c6 gia t6c, v$t dao dQng chlu th6m lgc qmiii ,1.U. ry.ejrfc$€u dqng t6c d,tlng_vho,Y$t khi d6: F = F *4 o nog' = mg+(-ma) * g' = g+(-a) Tromg hai tru&ng hEeI; chuydn $Ong nhanh dfln dAu vi ch$m aai qlu r"l "Eog aq l6E sla iOc tm !a tao liqPe tnSomg-qi€l ds"g":6 d0 l{6'rn **g.m1* iUi*U)-"a io-m ho'n g' Chu kr dao dQmg nh6 cr&a con lic don: tE q4 ET. vAB u gl a c1.it 111,i1 1_) r - -4)l <'1, + ChgnB- Kh6ns phii loai i-n dao d6ns. DA'vfidaodQugtitdim,v$tdaoa0os"hiv$tg6yraff!as6tcfrng thu$c hQ dao dQng thi lgc ma s6t lh ndi lngc vir dao dQng cfra hQ vin du-o.c coi li dao aOrg-trf do. I ChEn A (Trang 49 sg[< V{, 12, ddmg 15 tr& tr6n xudng). Ciu L4: M$t 6ng Ronghen ph6t ra bric xg c6 bu6c s6ng ngin nhdt lA 5,87.10-rrm. Bi6t e =1,6.10-19C, ": 3'tO8 nr/s vi h:6, 625.rc-34 i.s. 86 qua dgng ndng ban diu cria €lectr6n. Hi€u di€n th6 eita anot va eat6t crla onq ta A.2,00kv. 8.2,15kV. rr 4t t!!-r/ L. al.tJKv- IT It, , Tr nl-*i_2=lr \t 4t fb ciu L1: c6ban iico ta chit phSng xa p'c6 chu ki b6n r5 T:5,27 ndm. i{oi sau bao lau thi 25%kh()il,.rcmg c[:i mdt mau rl6t fiCo phin ra h6t? A. i0,54 ndm. E. 11,54 ndm. C.2,19 udm. D.9,12 ni.m. DA: *425% kltii tuqrg cfra mdu phin ri n6t tl?c lir cdn lgi 75%ms hay 3/4rmq. Ta c6: rn =m0.e-rt =(3/4)mo + ett =413:) t =2,19(nfuer) :+ Chgn C C6u 1?: Tia tu ngoai khdng . A. bith'ly tinh, nudc h6p thy. ts. c6 tdc dune chi6u sdnq. C. dugc ph6t ra tu cdc vAt duoc nung n6ng d6n tr€n 20000C. D. kich thich su ph6t quang crha nhiiu chdt. sA: T'ia t& ngogi ld bd'c x4 di6n tir cd budc sdng nhd ho.n bu&c s6ng crla tia tirir vd !6a ho,u bu6c s6ng c&a oi"'.I'k!|n3.nni-n th6y dug'c, b! thu!'tin\vi nwdc nfp thg ne4nh, c6 kAi nlng k{ch rhfch sag ph6r quang c** nhi6u chAt, do cdc v$t dugc nung nring d6m tr6a 20000C ph*it r.a. :+ Chgn E. ciu 13: chon phrit bi6u sai i<]ri n6i ve anl h."*g cira-ma s6t l€n c6c dao ddng A. Iv{a srit chinh li nguydn nl.rAn lirm tit m6t dao dQng. B. Kli co luc ma sdt tac dgng, dao d6ng crja h€ vdn duoc coi ld dao o'6ng tri do. C. Dir,h cQng huc"ng cdng cac ndu ma s6t cria m6i trucrng cdng nh6. A. r,uuK v . iJ. l, t )Kv. i 21,1!kyj D. 20,00kV. A &A: ong Ro-ogfuen phdt e'a b&_c xg- c6 bw6c s6mg ngfm unat *ng vo.i tr**&-ug ho.p toan sra' 'J{rg r\u{!Bri'ijt! fl-tuer ra D[r_c xS- co Dw{tc somg ngam frhat Hsg voi tr**d-ug hg.p toAn b$ dQng ndmg cula eleciron kei dap vao anot chaly6n triit taann ning luErag cfra photon tra x. Ta c6: I#a = €"uo,. =+a e uu* = lt =2trr61,6{y)=21,!6(kv) + chsm c Ario 8'A-io CAu 15: Trong dao d-6ngdiQn iT t.u rio cria mach cjao dQng LC .s. di€n tich bi€n d6i cung pha vdi ddng diQn. B. diQn tfch bi6n d6i ngu-oc pha v6i dong di€n. D. dign tich nhanh phi ntZ-sovdi tri truong B. Ee: :+ Chqn C.(phin chflr r-tb tou"g 119 sgk VLLZ) C6u 1,6: Cuong dd chrim sdng dcrn sac khi truyin qua m6i truorg hdp thp duoc x6c dinh bdi c6ng thirc ndo s,iu ddy? Trong d6 I0 la cuong d6 cua chirm s6ng t6i mdi trulng, d le dg Oai au*g di crha tia sdng, " fa"fre rO fr6p tf,u cfia mdi trucrng A.I=Io"od. B.I=Idecr1. C.I= crlsed. D.l= crlse-ed. EA: Th'eo dimfo lurAt vii sq hdp t*lu 6mh s6fr: Cuo'ug dg I c&a ch&mr sd,ng do-n sic kh! tnuy,im qua na6i trwdng h6p tlau gi6ma theo dinh luAt ha,na rmfr crira dQ diri d cua dmo'ng d'i tia sing: { = noe-oo = i;/eJ + Cja,:n F, Ciu 17: Ph6t bi,5u nAo sau diy sai vd d6ng co didn roay chi6u 3 phai A. Tu trucing qua,v cria,J6ng co do h€ ih6ng d,iil,. ,1i$n I lh:, ; , : ts. R6t, **av ciirme chiAu v,6'i tir tnwolre yi c6.t6c ai6 bipe fAm s6 e6c c01a ddnq di4il{ ba pha. C" ROt" qt"y d"qc 1A do momen luc cfia l&-'yhg:uay t6c dung' !-r rAns cn4r crr do d6ng ca sintl ra lu6n nh6 hcrn c6ng suAt cria 3 cuQn dAy cira stato. u. w'Jtt6 Jgs! vr EA: Trong aq*g "o diQn xoay chidu ha pha, tir trcndng quay iiugc tao ra nhil hQ thdmg ddmg di€m 3 pha, 'tfo trwbng uiay ta" dgng r6ornem lagc tir Xirm roto quay {heo chi€u quay cria tir tnw&ng, khi dO fulm cfra rmornen t# bing rruornenr cfrn, r6to se q*uy ai* vrri t6c aO gg" nhi hcu t5c d$ g5c cira tir tru"dng quay, tfrc tir nh6 hc'll ;t :6;;;"; iole-aie n- eirr. Do c6 "oog *#t hao phi, nCIn 16mg s*6t oo, trrl"c c6ng suit cd fch crla dQng ccr ludn nhd ho':e cdneg suit oua ba cuQn dAy cfra stato' ::) Chon ts' c6u i6: M6i pliO on c6 bufc sSng )", ndng lugng e thi c6 d6ng lucrng p vn kh6i luqng m la A.p:hc/I;m=h/tr. g.p: t.lc2;m: Elc. C.p=h/L: rn:h/c?"' D'p: e/h;m lle)" ^hchh EA:Voi photon: €=mcz =-=)m=ii p=mc=; :+ ChqnC' i"cLL c6u 19: Dit vao haidii-r tio4n m4ci, RLC kh6ng phan nhanh mot hieu drQn th6 xoay chiau u : ljo cos(a;t - n/3) thi dong diQn trong m4ch lA i : Is cos(or t - n/6). Do4n m4ch niy lupn c6: A. 21: R. 8.7,L< Zg. C.Zr:Zc. D. Zr> Zc, tr6 pha hom i => n'r4ch c6 tinh n(n) sA: DQ l6ctu pha gifra u:, ,,-q=q. -Qi: -;-[{J =-;<0+u dumg khing ) Zu<V'c- * Chqn E' C6un 20: MOr b6nh xe bit c=iu quay quanh tr-uc c6 dinh cta n6 c6 phucmg trinh I:A,5t'{rad;s). Ei6rn A tr€n vairh binh xe sau 2 s c6 vin t6c v: 2 r;Js.Gia t5c toan ph6n cua di6m A i&i dd c'5 gi6 fi .4,. a: 8,25 fili. B. a: Ji ,ntrt. C. a = +Jl ottt'- iD. a: 2,85 rr'lsz ' sA: T6c dQ g6c crla bSnh xe: 0) =q'=t(rad/s),t = 2(s)+ o:Z(rad/s)= y/R.^ + Rn = v/o =1(m) Gia t,6c g6c crfia binh xe: y = 9' = tr(rad / s2 ) Gia t6c fimap trry'6* @w&mg t6um) vh gra t6c trdp tuy6n cfta d[6m '4: fiu : (rrtR^ = 4(m /st), a, = TRe = l(m /S2) c6 d6 Gia t6c toirn phin c&a di6m a, u=-J*l +*l = Ji7(* I s2'1 ; 4,12(m/s2) + Cflqn ?li Tnro'g hqp nAo sau diy rn4ch diQn xoay chiiu *1-F ti€u thr.r cdng su6t do ngudn cung c6p? -A.Mecu Lq B' Mach RL' E. M"."h R6; D. iv{ach RLC khi c6 cQng huong' Da: Tnomg rngch diQm RLC *61 U6p, hQ s6 cdmg s'-rdt costp =NZ+ R = 0 thi cos<p = 0, m+ch khduag ta€u thg edng su6t do og*d* carng oip. + Chgn A' {,6w22:Ph6t bii5u nio sa'; o'ly li sai vA hign tuqng ph6t quang? a. anr, s6ng ph6t quang c6 budc s6ng diri.hcrn budc s6ng crla 6nh s6ng kich thich. n. m6i ch6t phat quang co mQt quang ph6 dic ty"g' cndt D- *" ktl.*stte kich thich sg ph6t quang cfrng s€ ngirng' EA, MOr;dGffi;;";g khr nap tuE *i*g l*Eug, khong ntit tnr6c phii "iaip tirst 6uh sius"[,ii; li qaa;g - phr6t quamgl. :+ Chgn C' cflu 23: Hai chit di6m dao dQng di€u hda dgc theo hai duoag thing song song, cgnh nhau v6i ci:ng bi€n dd vh ff?tvi * a" ua.g c,ia chrinicoi nhu trung nhau. o mOt thoi didm hai chAt di€m di ngang qua nhau, ngugc chiAu t4i vf tr-i c6 li do E * : - J3 N2. Da lQch pha ctra hai dao ilQng ld A. n. ts.2n13. C'n!3' D' trl2' EA: T4i mQt tho'i di6rua, hai ch6t di6rm dt qua nhau rt4i v1 tni lqil,:0i1 9 ,a J i il l-i x:-J3A/2 vA nguo,c chidu. Viy rndt chdr cliSnr s6 & trgng tlrdi r?cg vfi v! tri M1 vh chdt di6nr ica # trgag th:ii r?ng v6r "r! trf ly{z (nhu hinh b0r). ffi@ , = ftl3 . Suy ra d6 IQch pna giflra irai dao ddng bing fi l3 . + Chqn C. CAu 24: Ddt viLo hai .iiLr doan mach RLC khdng phAn nhdnh mgt hi€u di€n th6 xoay chi3u co tAn s6 f : j0 hz, hiQu diQn th€ hiQu dqng U = const. eitlt aign trd thudn R = 120 f), cugn ddy cAm thuAn c6 hQ s6 tu cem kh,3ng aOi. pl€u cninh dE diQn Cung crja tu di€n dtin gi6 tri C = 40/n tr$ thi Uc : max. Ta c6 a.L=9/10n{Eil) B.L: 1ln(H). c.L= 12/t0n(LJ). D.L:14il0n(H). D.{: X6t AOAC, 6p dr3ng dlnh ii hAsn s5 sin ta cri: tu,_u^uoR = -:- iiia Sin[i - s- = :: = CG[tSii siruo sinp ' {J.* Jnt+Zl .U = U. = siil q, j= i Uc*.* +> sira g = X. ++ ,:l : 900 ' sin$ Khi d6 F+y = 900 =+ tanB =cotany <+ U* = U" -U' uL {.JR + 7'Lt7'c-Zr) = R2 =+ Zr, = 1600 holc 90Q = Chgn.{. CAar 25: Gi6i han ouang diQn cria mQt kim lo4i dirng lim cat6t cta t6 bio quang dign phg thu6c vA.o A. bdn chAt cria kim loai d6 vdr bu6c s6ng crla 6nh s6ng kich thich. B. c6me thodt cria kim loai d6. C. culng tlQ vh budc s6ng cria 6nh sring kich thich. D. diQn truong gita an6t vi cat5t cria t6 bAo quang tli€n. D.A: Gioi irgn qNlang d'ifn c&a mQt kiua logi dfrng lirm catot cfra m$t t6 Uao quasE dign ti m$t ctic tr:rng r!6ng cfta kino logi d6, n6 chi phq thu$c vho ban chfft crla kiua logi. Ta c6 1.0 = hc / A . :+ chgn E" . CAr"r ?6: lviOt chi6c xe chay vci t6c d9 54 km,&, hq*g vi phia v6ch iuong dd cao. Xe ru ne,t nOl coi voi dn s5 1200Hz. F{oi trdn xe Ranimat-Van'nghe duoc ti6ng coi phdin xatuv6ch dri vdi t6n s5 bao nhi6u? Bi6t t6c dO truydn Am tiong kh6ng khi la 350 rnls. A.131 kE["" E. l,iz kl{z. C. 1,54 iGIz. D. i,3g kl{z. DA: Kfui Arm ph6t na t'ir xe v6,i tim s6 fo ve tr5,i vrich d5, ti;',,cfra 6m irfri d6p vho vfcfu dd dry-oc tinh theo c6ng thdrc c&a hiQu nimg Dop-le (ngandn phdt chuy6n dQng lgi gin mdy thm vo'i-v3m r^6c V vd m6y thu driug y€n): f'= -LS,, i Arn dw'gc phin x4 tfu'vich d{ v6'i tAn s6 i' vi quay tr& l4i xe" Trdua xe s6 nghe dwg,c Ane vo.r v-Y "' tdn sd f" (ngu6n phriii dtlug y6m, mdy thu cfouy6n ii6ng lai gin ngu6, phdt v6,i v$m t6c !J: f " = "; r' = $f, ; l,3t(knlz) :+ chsn .d. C6,u27z E0 bin cira mdt hat nhAn B.phu thudc vao di6n tfch h4t nhAn vd d0 hur khOi.,iu nzut'an aO. C. phu thudc hodn todn vdo ning lucrng li€n k6t cia hat nhAn d6 D. khong php thu6c vio sd khtii cria h4t nhAn. EA: il6 b€n cfia m6t h4t nh$,r'' phu thuQc viro ndng lurgmg li6n kdt vir s,6 nurcleon ,:u r hri kft6i nigma mirag !uglrg li€ua k6t ri€mg quem thuQc. = Chom A, fr CAu 2E: Khi tAn s6 g6c cria ddng di€n xoay chiAu li ro thi cdng sudt ti€u thp cua cuQn dAy c6 <i0 t.u c6m L vd di6n I - : rrs thuan K la ri. rti"u n6i ii5p cudrr diy v6i mgt tu dipn cd diQn dung C vsi2C!-0)2 : I thi c6ng sr.r6t ti6u thu cria doan m4ch lA Pz. Ta c6 A. Fr = Fz- F.Pr = Jipr. C.P2:2P1. D. Pr :2P2. DA: Khi ZCI.,lirl = L =) 22, - Z. ) tru#c khi mdc th6rm tr3 C vA sa".r khi mfc tq C t6ng tr'& ciia ni4ch khdng thay d6i. CGng su6t ti6u thg crla mgch diQn : P = I'R. =*.R = const * Chqn A. ,Zrt' Cdw 22: MOt thanh chiiu ddi L drng.d,iog Ui cl6, coi nhu chdn cria thanh kh6qg bi tnrqt. Thanh cO thOi lugng pt an U6-ad" vA c6 momen quAn tinh ddi v6i tryc quay di qua chAn cQt ld I =1,tfr:2/3, M la khdi luqng cira c6t. Goi 0 li g6c gioa thanh v6i phucrng thing drmg. Hdi dtin g6c 0 nio thi gia t6c ti6p tuy6n cria m6t di6m o dAu tr6n cria thanh 6ing mQt n'u''a gia t6c rcvi tu do g? B. sin A: U2. C. sin0:7/4. D.sin0=UJl . 8.4.: Fhuomg trinh dQng lryc hgc cria thanh ddi vo'i truc ,quay di qara E vi vu6mg g6c vfi m$t ph6ng hinh v6: N{e(L / 2}. sin 0 39.sin 0 M, =IY+Y=M./t=-=:r=.: E*' M{-j,/3 21- .t t a Gia tdc ti6p tuy€n cua di6rn A.: B, = TRo = T.n, = (3 / 2)g. sin B . Ee a, : gi2:+ sinCI =ii3 =+ Chgu A. CAu 30:. MQt do4n m4ch xoay chiiju PJC kh6ng phAn nh6nh dahg c6 dung kh6ng nhd hor cim kJr6ng. E€ xiy ra hi-4r t"qng cgng huong tr€n mgch cin .A. tang h€ s6 qu cim crla cuqn dAy. ts. eiimn di6n dunE Sifra tu di6m. - C.ting tAn s6 cria ddng dign. D. tdng di$n trd thuAn- 8.4.: m6 k6y na hiQm tffiEmg cQmg hu&ng, tfi'c []r Zt :7-c, ta ph6i tdmg Zq n6n phii gifrm C. + Chqm ts. Ciu 3X.: Mu5n quang ph6 v4ch cria nguy€n tu hydr6 chi phit ra 3 v4ch thi phni kich thich nguy€n tu hydr6 drln mfrc ning lugng cira qui d4o dtmg .A.M. B.N. C.O. D.F. ni 4- a3'I chil ph6t ra 3 v4ch ph6 thi p&Ai kich thich nguy6n tilr H d6n mlfrc ndmg.lugmg E:, tftc lir t ,{: t € nguyeix fir t edectron o qui d4o fr{, khi o{t nguyGn tw chi c6 th3 phSt ra 5a t'3ch phd fimg vo{ cdc srp chuy6m: Er * EziEz -) Eri E: J Er. =? Chqn A. CAu 3?: N{$t chit <ii6m dao d,,tng-diAu hda c6 phuong trinh x = 4 cos(4:rt + x/6) (cm; s). Sau2,25 giAy k€ tu lirc UEIE* khao s6t dao dQng, chit di6m di qua vi tric6 li d0 x : - ? .* A.7 lin. B. E ieE. C- 8 lin. D- 18 len. EA: Chu ki dao dQng c&a chAt di6n!: 2n 2n T-*'-: i;fi5{s} to 4n At = 2,25(s) = 4T' +T l2 Ban diu cUdt al6rn c6 trgng th:li ri'ng v&i di6m iVh, sau At = 2,25(s), ch6t di6m thnpc hiQn dugc 4,5 dao dQng, ch6t di6m chuy6n dQSS tndn diu tuonE rfrmg s€ quay duEc 4.,5 vdng vir vG to'i yi trf PI (nhnr hinh b€n). V$y ch6t di6mn dao d$rag s€ di qua vi tnf c6 li dQ x = -2 crm 9l6m = CEaqm ts" Ca-rn-33: C6c dong vi ctia cirng mQt nguy€n t6 tri'il,:0il9 A. sin€ = trl:. [...]... khorrg E a-usc t4o thinh bdi luc ii€n kiit giGa c6.c hat cira mOi t-uo:rg c6 bin ch{t vdr I nhuns c{i - :] !J deu la cac qud: trinh lan truy€n nang lucrg nlr*g chi c6 s6ng co gdy do su6t EA: 3 Chgn C Cdu 36: Chi€u m0t buc x4 c6 )' = 0,3 pm vdo cat5t cria mot t6 bao quang dign thi dugc m6t ddng quang di€n b6o hoa' C6ns su6t cira ngu6n bric xa ld 3 w Gii sir cir i00 ph6t6n tcri dap vao cat6t thi lim bgt ra... ndng cria conlic -thi tit tZo ueia apng tcn;ar dio dong co gla r[ Dang * i::,1:! lflg : A 3,25 N B 8,1 N DA: Khi ddng ndng bimg th6 ning, tfic ri (112)kx2=2 - = r'r ,5J = c tNe6 il#,m) =+ 3 N D 9 N ndng bdmg mQt nfra lr,i= l*-* = 9(N) cry *drg, t^Gl- ? Chon D CAu 39: M6t vit nho tham gia tiiing thoi hai dao d6ng diiu hda cr)ng phuon8 Xr : O.f: *rrrt (cm; s) V6i gi6 tri nio ctia 0 thi bi6n dQ dao dQng... aiuco^ainldugc cdng mgt sgi €i Quan s6t thiy s6ng dtmg ti6nc'iiu kiQn diy din Euydn s6ng khdng ddi ta cdn theo van t6c ff6ffi'"g=;af qoi 15 ilung iong tiong B' inng dn s6 ico 1'5 lAn' A giam * ,9 cii m[t nrla D.*ily tin so di i€n 1,5 lin c te*o ta* raiio gde'iao, c&a sqe day.phai thoi man diiiu kiQm: Cdu culiicn oal DA: Khi rram d6y dirn h6i hai d6u c6 dlmh c6 so5mg dtug, doi thi s6ng (chimh rh sil uqmg sdig)... Biiit hi€u diQn thi5 gifta hai diu cu6n cim.lh 5A Ji ff)' - nr, r A.26,33F',. -e.z.rotlrcF.a-i01/rr'*-D'410r/'zF - : ' O.{: C6ng s*6t c,la doan m?ch: F : U.I"cos,f = 1$0.i.rosi:i/4) = tr CIS 3 I = F "iiial : I?R:) R = P /L2 = 50Q =+ Ur = R.i = S0V?ry) g = x / 4+ tang = i =+ U -U" = U^ * {J = 160^8ry) * Z, = 10SQ:) C = 1S-4 /n(F) :+ Chgn C Y sai? CAu 46: Theo thuy6t tucrng doi (hqp) thi ph6t bi6u ndo... L"O fl, UUU! 6r!!r g U,rO" ,On! iang din,'nang luqng cria c6c phdt6n cung ting dAn' nei ain, tinh chAt h4t mo din' i ir"rr "traiiong-ro na, ill mffidffi nil","",, m -UOurg ** ui*it.t -r l2 +zqt'rt tu thi '- r-\- r-,-:^ ^A-^ , - i: usut ^X c&a thlnq s6ng diir iu' bu11 song giam "lin dAr' =) Chqn D' din, tinh ch6t uat tang ngo'4i ii6n tia -ii*"r".e *a nE,no lFErqrs clia s*ub :.-b - - x: 5 cosn(0,2t-... r"f = " O,'$rux) :) $ = 0,2n{rnd/s), =ry ffip-ae vv r - - t - N, N z = N,.9 'u, u2- N2= , Chgn C" ttii tiieu dqng bing 40 v' Hai dAu cuOn "* hd c6 hieu C it hon cuQn so ciP 30 vdng' DA.: Miy bi6n thii c6 m4ch thri' cip dO h6, ta c6: U, khoing }" = S(cna) f2: 919":1::p di€n T"l,T^^v dsng bingl20 V' CuQn :y the hiQu P'61:t:::j^0.1"::^Yl":*:e:^uien vsY:r li ^ F/ ,-\ = 0,5(crnis) 6$(cm) V$y qarflng... c&a mniu ch6t: g F{ = }-.N Khlii =} l{ = E!.1 },, = I{"T/ 0,693 = 1i}"3,7.10t0.3,2.8d4s0 / i},693 = 1,706E.1Ott (hat) InrEug cfra mina chAt: me = \o' +.M ; 6,35.10*(g) :+ Chgn D ;- -' NA CAu 4E: Trong thi nghi$m Idng v6 giao thoa 6nh sring, c6c khe S1 vA 52 duqc chi6u s6ng boi hai 6nh s6ng tlon sic )u 1 0,64 pm vA 1"2 = 0,48 trrm Khoing c6ch gita hai khe lit a:2 mm KhoAng c6ch tu m4t phing cn*"a trai... +5=i=+ 4 k, 1.r {lin trirng = $) mn: ifrng vr6.i iA: Ax = k, kr = kz 1g a = : 0) d6n 1,92(mm) vin s6ng cilrng nai' gim n6 nU6,t gim :+ Chqm D CAu 49: Nl6t.con lic.vQt l! . v4ch thi phni kich thich nguy€n tu hydr6 drln mfrc ning lugng cira qui d4o dtmg .A.M. B.N. C.O. D.F. ni 4- a3'I chil ph6t ra 3 v4ch ph6 thi p&Ai kich thich. dm. C. O6 thi auo Agng am cila tiilng mdy bay plidn luc ld nh['ng du]ng cong tuAn hodn. D. Niiu het idt khg thi d6 cao c'ia dm gilirn. CGu 34: A, lvl vir B theo thii- tg. rioan m4ch m6t hi$u diqn thii u : i00 8 cosi00 7Tt (V), C6ng suAt tiSu thu P : 100 W. Ddng cii$n nhanl'i pha hcm hi€u diqn th5 m6t g6c n l q . eiethiQu ciiQn th5 gifi'a