Luyện thi cấp tốc các dạng bài tập từ các đề thi quốc gia môn vật lý (NXB đại học sư phạm 2011) phạm đức cường phần 3

C a u 14) C Do CO = — = 2VLC Z = > Z L = — => m^ch c6 tinh dung khang=> i nhanh pha hon u C a u 15) C K h i K dong m^ich chi c6 R Ii = — R K h i K ng3t m^ich gom R noi tiep X => I2 = — ( Z la t6ng tra ciia m^ich) Z Theo de bai l i = I => R = Z N h u v^y chi c6 dap an C thoa man dieu k i ^ C a u 16) D C a u 17) A K h i C = Co t h i cong suat m^ch d^t cvrc d^i => m^ch xay hi?n tugrng cpng h u o n g d i ^ n =>co = V J— LC => f = H z C a u 18) B U, n, ^ 100 U2 n, U2=50V U2 C a u 23) B C a u 22) D C a u 20) A C a u 19) A C a u 21) A C a u 24) A Nhi?t liTQrng toa tir liic ban dau den luc t i t hin chinh la nSng lugng ban dau ta cung cap cho m^ch Q = W = ^C.Uol C a u 30) A C a u 29) A C a u 26) B C a u 25) C C a u 27) D C a u 28) C C a u 31) C C a u 32) D he Tir A = — ^ONa = , {XQ la giai h^n quang di^n ciia k i m lo^ii) => XQ^U urn ; >toAi = 0,3urn; 0,36 C a u 33) A KhiBcodjnh: U | K h i B t v d o : l = m - ( m = 1,3, 5, ) Theo de bai t a c o 5— = m— = > m = 10 (lo?ii) 200 Cau34)A Theo du ki?n bai toan, ta c6: ^ Do Xi > A.2 Eao2 = ilE + E j i ; i}£ = ] ^ + > E E = = -0,85 eV ^ Cau36)D Cau 37) C NSng lugrng lien ket cua h^t nhan Heli AWik = Am.c^ ( A m ) dp hyt khoi cua He) N i n g lugrng lien ket rieng cua Heli la AWikr = ^ = , l M e V Cau 38) C Tir cong thuc (R + r)2+(ZL-Zc)' P,d c\rc d^i R = =>Pcdmax = 120 W Cau 39) A Khoi lu(7ngNatri l ^ i sau nam: m = — ^ = 1,7 ,23 => So h^t Natri l?ii sau nSm l a N = ^'^"^'^"^"^^— In => D Q phong cua lugng Natri igi la H = Cau 40) D Cau 41) A Luc t = : X = A v$t a vj t r i bien, do v^t d i qua vj t r i can bSng Ian t h u nhat roi den x = Ian t h u nhat mSt khoang thai gian v^t qua vj t r i x = ^ "jy • Con l ^ i 2008 ISn tuc v$t thvrc hi?n 1004 dao dgng niJa V ^ y thai diem v§it qua vj t r i x = Ian t h u 2009 la t = 0 T + — T = 20,088 s 12 201 C a u 42) D C a u 43) B Do U A N vuong pha v a i U A B => M^ch xay hi?n tugng cpng huang di?n U N B I?ch pha 60° so v a i i => cupn day c6 di?n tra Theo gian vecta: UNB = - ^ ^ = 200 V ,0 cos60 C a u 44) D Ta c6: eU, = E a i ; eU2 = E U2 = U i ( v j = 2vi nen Ed2 = 4En) C a u 45) B K h o i lugrng l ^ i la m ' = « x > = - > 2T C a u 46) D C a u 49) A C a u 47) C nig = 16 g 2^ C a u 48) D T ^ i vj t r i dpng nSng bang ba Ian the nSng la |x| = y = 2,5 cm => L v c h o i p h y c c o d p l o n |F| = k|x| = , N C a u 50) A K h i djch chuyen khe S thi t ^ i O la van toi thur (ti'nh tir van sang trung tam) => van djch chuyen mpt do^in x = 2,5i = 2,5 — a Tir X = ^ y =>y = 0,2 mm (vai y la dp djch chuyin cua ngu6n S) C a u 51) C Tirco = (Oo + yt = > y = rad/s^(vai coo = 30rad/s , co - ) =>G6c quay dupe la a = — = 150 rad 2y C a u 52) K h i a„ = a, => y = (0^ Tirco = y t = > t = 0,25 s C a u 53) C C a u 54) A Chpn tryc qiiay di qua C va vuong goc v a i thanh, nkm mat phSng vuongl goc hinh ve Theo djnh l i Huygen : Ic = I G + m C G ' ^ l o = l o ^ mCG^ CG = ^ = ^ ^ ^ ^ ± £ ^ - > CG = ^ ^ 202 Ciiu 55) A Chu ki dao dgng ciia lie la) T = 2?^^^ ^ JQ^ VTCB T A Thai gian di do^n x bing — = — =:> x = — 30 -A Tir A = Al + X => A = 2cm (Al = ) C O Cau 56) D Khi tan s6 goc cua dong di?n bang coo, ta c6: ZL = cooL va Zc = ' — = ( O o ^ L C = 4.(l) (OoC Khi tan so goc cua dong di|n bang (o thi mach xay cpng hirang nen ta c6 (O^LC= 1.(2) T i r ( l ) v a (2) => co = 0,5coo Cau 57)B TirAt =• Ato >At = 69 phut 1Thai gian dong ho chuyen dpng ch^m hon so vai dong ho dumg yen la 39 phiit Cau 58) A Cau 59)A Dpng nang cvrc d^i ciia cac quang electron thoat khoi catot la: A Djnh li dpng nang: Edmax electron den anot) Cau 60) C = C.UAK + EdOmax = 5,27eV (vai Ea^ax la dpng nang cua 203 ON LUYEN OAI HQC I Phan Chung cho tat ca thi sinh (gom 40 cau): Cau 1) Con lie dan dao dpng t^i noi co gia toe trpng tnrong g = 10 m/s^ Khi v^t n|lng A di tir vj tri can bang vj tri bien thi dpng nSng chi chuyen hoa the nSng B di tir vj tri can bang vj tri bien thi lyre cSng day tSng dan C di tu vj tri bien ve vj tri can bang thi the nang chi chuyen hoa dpng nang D qua vj tri can bang Ivrc cang day co gia trj ion hom trpng lyc tac dyng vao v$t Cau 2) V^t dao dpng dieu hoa vai t i n so goc co, co thai gian de dpng nSng l^i bang the nang la (0 yj2 2(0 n Cau 3) Con lac dcm dao dpng dieu hoa vai phuang trinh x = 4cos( 47rt + —) (cm) Thai diem nao sau day lac qua vj tri co li dp x = - cm Ian thiir 5? A - s B -8s C Is D 24 ^ Cau 4) Mpt 16 xo co dp cumg k = 100 N/m treo thang dung, d§u dual co v$t M = I kg Khi h ? dang can bSng, djt nh? nhang mpt v^t m = 0,20 kg len v^t M H$ sau dao dpng dieu hoa Tinh l^rc dan hoi cyrc d^i ciia 16 xo h$ dao dpng Lay g=10m/sl A 12N B.16N C I O N D 14N Cau 5) Mpt v^t thvrc hi^n dong thai hai dao dpng dieu hoa cung phuang, ciing tan so Xi = Acos(507rt + - J ) ; X2 =Acos(50jrt + 92)- Biet pha ban dau ciia dao dpng tong hprp la (p = ^ , 92 CO gia trj bang: A.^ B.^ C D 6 Cau 6) Con lac 16 xo co khoi lupng v^t n§ng m = 100 g treo thang durng dao dpng dieu h6a t^i nai co gia toe trpng truang g = 10 m/s^ Trong qua trinh dao dpng, I\rc day eye d^i tac dyng len diem treo co dp Ian bang trpng lyc tac dyng len v^t Lyc hoi phyc eye d^i co gia trj bang A N B 1,5N C.IN D N Cau 7) Cho do^n m^ch gom cupn thuan cam mac noi tiep vai ty co difn dung C bien doi va bien tra R Di^n ap hai dau m^ch u = U V2 cos 100 7t t (V) Ban dau thay doi R den gia tr| Ro thi cong suat m^ich eye d^i va bang 100 W Sau giS nguyen gia trj Ro va thay doi C den gia trj Co thi cong suat m^ch l^i eye d^i va bang A lOOW B SOW C.400W D 200 W 204 Cau 8) T^i diem S tren m^t nuac yen tinh c6 nguon dao dgng di§u hoa theo phuang thSng dung vai tin so 50 Hz Khi tren m$t nuac hinh mgt h? song tron dong tarn S T^i hai diem M , N nim each cm tren duang thing di qua S luon dao dpng cung pha vai Biet ring, toe dp song c6 gia trj xac djnh tu 70 cm/s den 80 cm/s Toe dp truyen song tren m$t nuac la A 70 cm/s B 72 cm/s B 80 cm/s D 75 cm/s Cau 9) Chpn phat bieu sai: A Cac d?ic trung sinh li ciia am gom c6 dp cao, dp to va am sic B Dp cao cua am chi ph\ thupc vao tan so am C Dp to cua am chi phy thupc vao tan so am D Nguang dau hau nhu khong phy thupc vao t i n so am Cau 10) Trong thi nghi^m giao thoa tren m$t nuac, hai ngu6n k i t hprp, cung pha A va B CO tan so 50 Hz T^i dilm M each A va B la di = 19 cm va d2 = 21 cm dao dpng vai bien dp c\rc d^i Cho biet giua M va duang trung tryc cua A B khong CO eye d^ii nao khac Toe dp truyen song bSng A 10 m/s B 100 cm/s C 10 m/s D 100 m/s Cau 11) Khi c6 hifn tupng song dCmg tren mpt day dan hoi, hai diem byng doi xung qua mpt nut s6 dao dpng A ciing pha B ngupc pha C vuong pha D l?ch pha 45° Cau 12) Trong m^ich dao dpng LC li tuang, nhung d^i lupng bien thien cimg pha la A dif n tich q ciia ty va di?n ap u gifta hai dau ty dif n B cuang dp dong di^n i qua cupn cam va dif n ap u ciia ty di^n C difn tich q cua ty va cuang dp dong di?n i qua cupn cam D cuang dp dong di$n i qua cupn cam va dif n ap a hai dau cupn cam Cau 13) M^ich dao dpng LC If tuang dupe diing lam mgch chpn song ciia may thu May thu dupe song v6 tuyen c6 buac song la 60 m Ghep them ty di^n c6 di?n dung Co = 4C noi tiep vai C thi may se thu dupe song v6 tuyen c6 buac song: A 75 m B.48m C 120 m D 53,7 m Cau 14) Chpn phat bieu sai: A Song v6 tuyin c6 buac song Ian hom 3000 m dupe dung thong tin lien dual nuac B Anten la mpt m^ch dao dpng C Nguyen tic thu song di?n tu dya vao hi?n tupng cpng huong difn tu D Sy phat song di?n tu khong dya vao hi^n tupng cpng huong di^n tu Cau 15) Chpn phat bieu sai Song di?n tir A di tir khong vao nuac se doi phuang truyen B CO toe dp nhu mpi moi truang C la song ngang D truyen dupe chan khong 205 Cau 16) M p t khung day dan hinh chir nh^t gom 1000 vong, di?n tich moi vong day la 55cm^, quay deu vai toe d p goc 3000 vong/phiit quanh tryc x'x mpt tir truang deu B ( B c6 d p Ian 0,02 T va duang cam umg tir vuong goc v6i tryc , quay x'x) Bien d g suat di?n dgng xuat hi?n khung bSng A 345,58 V B 244,35 V C 220 V D 380 V Cau 17) M g t do^n m^ich xoay chieu RLC noi tiep, vai R la bien tra c6 gia trj tuO den 0 r i D i f n ap hai dau m^ch c6 gia trj h i | u dyng U , tan sof Thay doi R den giatri A RothiULmax'lucdo R0-2OOQ B u C R„=0 D R „ ^ L i f - C27;f L27ifC27tf Cau 18) Mpt do^n m^ch AB chi chua hai ba linh ki?n) di^n tra thuan R, cugn cam thuan L, ty di?n C D$t vao hai dau dogn m^ch A, B mpt di?n ap xoay chieu u = Uocosoot thi cuang dp dong di?n qua m^ch la i = Iocos(cot + — ) Dop m^ch AB gom c6 D khong xac djnh dugc C R va C B L va C A R va L Cau 19) De truyen tai di^n nSng di xa, t^i nai phat nguai ta dung mgt may t5ng ap CO ti so so vong hai cugn day la Di?n ap hai dau day nh^n dugc a nai tieu thv la 220 V Biet cong suat hao phi tren duang day tai di^n la kW; di?n tra cua day tai di?n la 10 Q Hoi di^n ap hai dau cugn thur cap ciia may bien ap a noi phat la bao nhieu? A 640 V B 160 V C 220 V D I I O V Cau 20) Trong dgng ca khong dong bg ba pha, neu t i i truang ciia mgt cugn day d^t gia trj c\rc d^i la Bo va huang vao cugn day thi tir truang cua hai cugn day A l^ii bang B bang va huang vao hai cugn day Sy C bang va huang ngoai hai cugn day ay D khong the bang Cau 21) May phat di?n xoay chieu mgt pha va ba pha deu A ho^t dgng dya tren hi?n tugng cam img di?n tir va vi^c sir dyng tir truang quay B CO stato la ba cugn day d$t l^ch 120° tren vanh tron C CO phan cam t^o tir truang la nam cham d i | n ho^c nam cham vTnh cuu D CO roto phai la phan cam; stato phai la phan img 206 Cau 22) Do^n m^ch di?n nhir hinh ve D^t vao hai dau do^n m^ch mpt di?n ap xoay B chieu u = 100V2cos(1007rt + ^ ) V thi dong di?n qua m^ch ch^m pha ^ so vai di?n ap hai dau m^ch., Thay von ke (V) bang ampe ke c6 di?n tra khong dang ke thi dong di^n qua m^ch c6 gia trj hifu dyng la A Biet von ke c6 di?n tra v6 cung Ian va cupn day c6 dp ty cam L = — H Di?n tra ho^t dgng ciia cupn 71 day bang A 50V3 Q D 50 n B n V3 Cau 23) D$t vao hai dau mgch di?n RLC (difn tra R c6 gia trj thay doi dixgc) mac noi ti^p mpt di?n ap xoay chieu c6 tan so 50 Hz on djnh Khi thay doi R den gia trj Ro = 100 Q thi cong suit tieu thy tren di^n tra d^t gia trj eye d^i Biet cupn day CO dp ty cam L = — H, di?n tra r = 60 Q Di$n dung ciia ty c6 gia trj 271 bang A 10- B 10- c 10" D 10" 137: 37t 1371 31 Cau 24) Cho m^ch di?n AB gom mpt di?n tra thuan R = 27,5 n, mpt ty di^n c6 di^n dung C = ^ ^ ^ F , mpt cupn day c6 dp ty cam L = — H va c6 di^n tra 67t 4n thuan r = 22,5 fi Cac phan tOr tren dupe mSc noi tiep vai D^t vao A, B c6 mpt di^n ap xoay chieu u thi di^n ap giira hai ban ty di?n c6 bieu thuc u^ = 160cos(1207rt ) (V) Bieuthuc cua di^n ap u la A u-lOOcos 1207:t- 37t 4; (V) B U = 100N/2COS 1207tt- 31 (V) D u = 100V2cos 1207rt ( V ) C u = 100cos 1207rt- - ( V ) 4J Cau 25) Hi^n tupmg tac sSc A chi xay chieu chum anh sang trSng h^p qua iSng kinh B xay chieu chum anh sang dan sSc bat ki qua lang kinh C khong xay chieu chum anh sang h^p qua ban hai m$t song song lam bang chat suot D xay chieu xien goc chum anh sang h^p, khong don sSc tir khong vao moi trucmg suot bat kl 207 Cau 26) Mpt lang kinh c6 goc chiet quang A = 30° lam bSng thuy tinh ma chiet suat doi vai anh sang la na = V2 va doi vai anh sang tim la n, = >/3 Chieu mpt chiim tia anh sang trang vuong goc vai m$t ben ciia ISng kinh Goc t^o boi tia 16 mau va mau tim la A 45° B 60° C 15° D 75° Cau 27) Trong thi nghi^m giao thoa Y-ang: Khi chieu anh sang dan sic c6 bu6c song X = 0,6 ^m vao hai khe, nguai ta dirgrc khoang each giCra van toi thu (tinh tir van sang trung tam) va van sang b^c gan nhat bang 2,5 mm Khoang each tir hai khe den man quan sat la m Khoang each giira hai khe bang A 1,5 mm B 1,2 mm C 0,6 mm D mm Cau 28) Chieu mpt chum anh sang trSng vao may quang Tren dirang di cua anh sang trSng den may quang pho, ngirai ta d^t mpt den hai hidro (hai hidro loang va dang dug^c kieh thich phat sang) Tren tam kinh ma ciia may quang A t^i cac vj tri ciia v^ch do, lam, cham, tim cua quang lien tyc s6 tra v^ch toi B van thu dugre quang lien tyc nhimg dp sang cua cac \^ch thay d6i C cac v^ch do, lam, cham, tim doi vj tri cho gpi la hi^n tupng dao sic D quang ph6 thu dupe chi c6 cac v^ch do, lam, cham, tim Cau 29) Song difn tir eo buac song X = 0,2 jim A dupe dung de say kho, suai am B dupe dung phat hi^n vet nut ben kim lo^i C khong the gay hi?n tupng quang di?n D truyen dupe qua th^eh anh Cau 30) Di?n ap giua hai eye cua mpt ong tia Ranghen la 25 kV Bo qua dpng nSng ciia e khoi catot Buac song ngin nhat cua photon dupe buc tii ong Ranghen bang A 49,7 pm B.49,7nm C 25,6 pm D 25,6 A° Cau 31) Cho ban kinh cua cac quy d^o dung cua nguyen tir hidro la ri = 21,2.10" m; r2 = 47,7 10"" m; r3 = 84,8 l O " m Nguyen tir hidro kem ben vung nhat electron a quy d^o dimg c6 ban kinh A r i B r2 C r j D r, ho$c Cau 32) Do^n m^ch difn gdm quang tra noi tiep bong den D$t vao hai diu do^n m^ch mpt di?n • ^ — • ap mpt chieu khong doi Chieu vao quang tra ^ ^ anh sang c6 buac song nho han giai h^n quang dif n ciia chat ban dan lam quang tra Dp sang cua den A khong doi giam euang dp anh sang chieu vao B tSng giam euang dp anh sang chieu vao C khong doi tang eucmg dp ehiim anh sang chieu vao D tang tang euang dp chum anh sang chieu vao 208 C u 33) Tia Laze a A khong CO tinh dom s4c cao B gom cac photon c6 cung tan so va cung pha C khong truyen duQfC chan khong D dam xuyen m^inh vi c6 buac song ngin nhu tia tir ngo^i C u 34) Phat bieu nao sau day sai? a A Huynh quang la s\ phat quang c6 thai gian phat quang ngin (dual 10'* s) B Lan quang la svr phat quang c6 thai gian phat quang dai (10"* s tra len) C Anh sang kich thich c6 buac song nho hon buac song ciia anh sang phat quang nen c6 the thupc vung anh sang nhin thay D Buac song anh sang phat quang lan hom buac song anh sang kich thich nen CO the thupc vCing hong ngo^i C u 35) Phat bieu nao sau day diing? a A Phan h^t cua mpt h^t sa cap c6 cung khoi lugmg va cung di^n tich B H^t natrino khong mang di?n nen khong c6 phan h^t C Photon chi ton t^i tr^ng thai chuyen dpng D Chi CO ba lo^i tuang tac cua cac h^t sa cap la tuang tac hap dan, tirang tac difn tir va tuang tac m^nh C u 36) Chieu anh sang tir ho quang di?n vao tim kem trung hoa ve di?n dang a dirge d$t tren gia each di?n thi tam kem A tich di^n am den mpt gia trj xac djnh nao B van trung hoa ve di?n C tich di^n duang den mpt gia trj xac djnh nao D tich di^n am C u 37) Thvrc chat, tia phong x? P" a A dupe phong mpt natron h^t nhan phan proton B la electron h^t nhan bj kich thich phong C la mpt phan nang lupng lien ket ciia h^t nhan chuyen hoa electron D la electron v6 nguyen tOr b| kich thich phong C u 38) Chpn phat bieu sai ve phan ung h^t nhan toa nSng lupng: a A Tong khoi lupng ciia cac h^t truac phan umg lan han tong khoi lupng ciia cac h^it sau phan ung B Tong dp h\it khoi ciia cac h^t truac phan ung lan hon tong dp hyt khoi cua cac h^t sau phan ung C Cac h^t nhan sau phan ung ben viJng hon cac h^t nhan truac phan ung D Tong nSng lupng lien ket cua cac h^t nhan truac phan ung nho hom tong nSng lupng lien ket cua cac h^t sau phan ung C u 39) Cho phan ung h^t nhan a on U Ba +11 Kr + {jn + 200MeV Gpi Mo la tong khoi lupng cua cac h?it truac phan ung; M la tong khoi lupng cua cac h^t sau phan ung va cho u = 93 IMeV/c^ (Mo - M) c6 gia trj la A.0,3148u B 0,2l48u C 0,2848u D 0,2248u 209 Cau 11: Chpn cau phat bieu sai noi ve song am A Am cac nh^c cy phat c6 tan so ciia am ca ban B Nh^c am la nhCrng am c6 tan so xac djnh C Am nghe dupe c6 tan so tir 16 Hz den 20 kHz D Nguong nghe hau nhu khong phy thupc vao tan so Cau 12: Chpn cau sai noi ve may bien ap A May bien ap a che dp khong tai (hai dau cupn thur cap de ha) thi no hau nhu khong tieu thy di^n nSng B Trong kT thu^t han di^n, nguai ta su dyng may bien ap c6 so vong cupn so cap Ion han so vong cupn thur cap C Tir thong qua hai cupn so cap va thu cap la nhu D May tSng ap se lam giam cuong dp dong di^n Cau 13: Chpn phat bieu dung: A Cong suat hao phi tren duang day tai dif n ti 1? vai cong suat can truyen tai B Chi do^n m^ch di?n xoay chieu c6 di^n tra R thi dong di^n mai cung tan so vai di?n ap hai dau do^m m^ch C Khi CO cpng huang do^n m^ich di^n xoay chieu RLC mic noi tiep thi di?n ap giua hai dau do^n m^ch dat gia trj eye d^i D Trong may phat di?n xoay chieu ba pha luon c6 roto la phan cam, stato la phan irng Cau 14: D^t mpt difn ap xoay chieu u = 200 V2 coslOOnt ( V ) vao hai dau do^n m^ich gom bien tra, cupn cam thuan va ty di^n mac noi tiep Thay doi bien tra den cac gia trj Ri = 75 Q va R2 = 125 Q thi cong suat P cua dong di^n m^ich AB CO gia trj nhu la A.400W B.200W Cau 15: Mpt do^n m^ich di?n xoay chieu nhu hinh vg Khi k dong, dong difn qua m^ch ch$m pha han di^n ap hai dau m^ch la — Khi k ma, dong di?n C lOOW D 50 W R B qua m^ch ch|m pha han di^n ap hai dau m^ch la — Biet X chi chua mpt ba phan tu: di?n tra thuan R, cupn day thuan cam L, ty di?n C X la A R B L C C D Khong the ket lu^n dupe Cau 16: Mpt do^n m^ch gom di?n tra thuan R = 100 Q, ty di^n C , cupn cam thuan L mic noi tiep D$t vao hai dau m^ch mpt di^n ap xoay chieu c6 tan so 50 Hz 6n djnh thi UR = U L = Uc va m^ch tieu thy cong suat 200 W Thay ty C bang ty C thi cong suat tieu thy ciia mgch bSng 50 W Gia trj C hkng bao nhieu? A 11,65 ^iF B.31,8HF C 22,5 )aF D 15,9^F 31S Cau 17: Mpt bong den day toe dugrc mSc vao m^ng difn khong doi U = 220 V thi thay den sang binh thuong Khi mSc vao m^ng di$n xoay chieu c6 d i | n ap c\rc d^ii Uo thi den cung sang binh thuong Uo c6 gia trj la A I I O V V B.220V2V C l l O V D.220V Cau 18: Dpng co khong ddng bp pha c6 A toe dp quay cua roto c6 the ion hon toe dp quay cua tir tnrong B chieu quay cua roto khong thay doi dupe C nguyen tac ho^t dpng d\ra tren hif n tupng t\ cam D cong suat tieu thy bang tong cong suat tieu thy a cupn day Cau 19: M^ch di^n xoay chieu RLC (R ^ 0) mic noi tiep c o c o L — J - = R Neu coC giam tan so dong difn va giu cac thong so khac khong doi thi hf so cong suSt ciia m^ch A tang roi giam B luon khong doi C luon giam D luon tang Cau 20: Mpt do?in m?ich difn xoay chieu RLC noi tiep (cupn day thuan cam) D^t vao hai dau m^ch mpt di^n ap xoay chieu u = 100 V2 cos(1007tt ~ ) CV)- Biet R = 50 Q , ZL - Zc = -j^, bieu thuc cua dong di?n qua m^ich la A i = V3cos(1007rt+ y ) A B i = V6cos(1007rt+ y ) A C i = N/^cos(1007rt+ - ) A D i = N/6 cos(1007rt + - ) A 6 Cau 21: Phat bieu nao sau day la diing? A Song difn tu c6 the la song ngang ho^c song dpc B Song di^n tu chi Ian truyen moi truong v^it chat C V?in toe song di^n tu bang 3.10* m/s, khong phy thupc vao moi truong D Song di^n tu luon la song ngang va Ian truyen dupe ca chan khong Cau 22: M^ch dao dpng difn tir gom cupn day thuin cam L = 50 mH va ty di?n C = 50->iF Biet gia trj eye d^i cua di^n ap giOa hai dau ty difn la 12 V T^i thai diem di?n ap gifta hai dau cupn day bang V thi nang lupng di?n truong va nang lupng tir truong Ian lupt la A 2.10"^ J va 1,6.10^ J B 1,6.10-^ J va 2.10"* J C 2,5.10-' J va 1,1.lO-" J D 0,6.10-' J va 3.10-" J Cau 23: Chpn phat bieu dung: A NhiJng song di^n tu c6 tan so lom hon 30 MHz c6 the xuyen qua tang difn li cua quyen B Khi song dif n tu truyen di no mang theo cac phan tu v$t chat cua moi truong C Song dif n tir c6 cung ban chat voi song ca hpc D Cuong dp difn truong xoay cang yeu toe dp bien thien cua tir truong cang nhanh 316 Cau 24: M?ich song LC ciia radio c6 L = 0,1 H De bit dugrc song cua dai phat TPHCM (tan so 99,9 MHz) thi phai dieu chinh ty C c6 gia trj bSng bao nhieu? A 50,35 B.31,8^F C 15,9 nF D 63,6 ^iF Cau 25: Chpn phat bieu sai: A M6i anh sang dorn sic c6 mpt buac song chan Idiong xac djnh B Anh sang m^t trai la hon hgrp cua v6 so anh sang dan sic bien thien lien tyc C Cac anh sang c6 buac song tu 0,2 den 1,2 mai gay cam giac sang a mat D De xay hifn tugrng giao thoa anh sang thi hai song anh sang phai dugrc phat tu hai nguon ket hgp Cau 26: Trong th\rc te, de sSy kho suai am nguai ta dung buc x^ c6-buac song, khoang A 0,76 ^m den vai mm B 0,38 fxm den vai nm C 10"* m den lO"" m D nho hon lO"*" m Cau 27: Chpn phat hiku sai: A Cac tr^ng thai diJmg cua nguyen tu ung vai qui d^o c6 ban kinh hoan toan xac dinh B Thai gian song cua cac nguyen tu cac tr^g thai kich thich c6 the keo dai den vai chyc giay C Buac song anh sang kich thich nho hon bu6c song anh sang phat quang D Hif n tugfng Ian quang thuang xay vai chat r5n Cau 28: De buac song cua anh sang, nguai ta tien hanh thi nghif m giao thoa anh sang vai khe Young Chieu sang hai khe bang nguon laze c6 buac song X Biet khoang each giOa hai khe la 0,5 mm, khoang each tu hai khe den man la m va tren man quan sat, khoang each giua van sang lien tiep dupe la mm Buac song X bSng A 0,5 urn B 0,75^m C 0,6 nm D 0,4 ^im Cau 29: Nguai ta d$t gitta anot va catot cua ong Cu - lit - gia mpt hi?u dif n the Ui thi buac song ngSn nhat ciia tia X phat la 0,2 |jjn Neu d^t vao giiia anot va catot mpt hi?u di^n the U: = 2Ui thi buac song ngin nhat cua tia X phat bSng bao nhieu? A 0,2 ^m B 0,1 nm C 0,05 ^m ^ D 0,75 ^im Cau 30: Phat bieu nao sau day khong thupc npi dung cua thuyet lupng tu anh sang (thuyet photon)? A Anh sang dupe t^o bai cac h^t gpi la photon B Vai anh sang c6 tan s6 f thi m6i photon mang nSng lupng bing hf C Trong chan khong, photon bay vdi toe dp c = 3.10* m/s D Electron sS b$t khoi kim lo^i neu dupe chieu sang thich hpp 317 Cau 31: Chi^u vao tam kim loai m9t buc thi xay hi^n tugng quang difn Khi giam buac song va tang cuong dp chum buc x^ thi A v^n toe c\rc d^i ciia electron quang di?n giam B so electron quang di^n b$t khoi catot mpt giay tSng C so electron quang di^n b^t khoi catot mpt giay giam D v^n toe cvre d^ii cua elecron quang di?n khong doi Cau 32: Nguyen tac ho^t dpng cua laze la dvra vao hi^n tugng A quang di?n B quang di^n ngoai C phat X? ty phat D phat x^ cam ung Cau 33: Kich thich dam nguyen tiJr hidro tijr tr^ng thai ca ban bang vife cho hap thy photon CO nSng lugng thich hgp Biet so v^ch phat la Ban kTnh quT d^o ung vai trying thai kich thich bSng A 5,3.10-" m B 4,77.10-'°m C 1,59 10"'° m D 8,48 10'° m Cau 34: Chpn phat bieu sai: A H^t nhan nguyen tu dugc cau t^io tu cac nuelon B Khoi lugng nguyen tir t^p trung gan nhu toan bg a h^t nhan C Kich thuae h^t nhan ti 1? vai binh phuong so khoi D Dong vj la nhirng h^t nhan ciing so proton khac so natron Cau 35: Mgt phan ung h^t nhan toa nSng lugng X] + ^2 Y+n Biet nSng lugng lien ket cua cac h^t nhan X i , X2 va Y Ian lugt la a, b va c NSng lirgng toa cua phan ung la A a + b + e B a + b - c C.c-b-a D a + c - b Cau 36: Dong vj ^ C o la chat phong x? vai chu ky ban T = 5,33 n5m, ban dau mgt lugng Co c6 khoi lugng nio Sau mgt nam lugng Co tren bj phan r5 bao nhieu phan tram ? A 12,2% B 87,8% C 30,2% Cau 37: Trong qua trinh bien doi h^t nhan, h^t nhan D 42,7% chuyen h^it nhan ^92 U sau da phong mgt h^t a va hai A proton B natron C electron D pozitron Cau 38: Tim phat bieu sai So vai phan ung phan h^ch thi phan ung nhift h^ch A toa nang lugng Ion han (neu tinh tren mgt dan vj khoi lugng nguyen lifu) B CO nguon nhien lif u rat nhieu tren Trai Dat C de kiem soat hon phan ung phan h^ch vi khong c6 phan ung day chuyen D khong gay nhiem moi truang nhu phan ung phan h^ich Cau 39: Tuang tac di^n tir A la tuang tac giila cac h^t mang di^n va khong c6 khoi lugng B CO cuong dg l\rc tuang tac rat Ion so vai tuang tac hap dan C luon xay doi vai cac h^t sa cap D chi xay cac h^t a h^t nhan nguyen tij 318 Cau 40: D phong xa ban dau ciia nguon phong xa chua No hat la HQ Khi dp phong x^ giam xuong 0,25%Ho thi so h^it nhan da bj phong x? la 4 II Phan rieng A Danh cho thi sinh h(fc chvong trinh chuan (tu* cau 41 den cau 50) Cau 41: Khi noi ve dao dpng di^u hoa cua mpt v$t, khSng djnh nao sau day la sai? A L\rc hoi phyc luon trai dau voi li dp B Chu ki la khoang thai gian giu-a hai Ian lien tiep li dp va v^n toe l$p l^ii gia trj nhu cu C The nang va ii dp cua v$t bien thien ciing tan so * D Trong mpt chu ki v$t di dupe quang duong bang Ian bien dp Cau 42: Chpn y sai Mpt vgt dao dpng dieu hoa vai phuong trinh x = Aeos(©t + (p ), d?ii lupng A CO gpi la tan so goc ciia dao dpng B A gpi la bien dp dao dpng C (p phy thupe vao cac kich thich ban dau D A khong phy thupe kich thich ban dAu Cau 43: Mpt nhung d$c trung sinh li ciia am la A tan so B am sic C muc cuong dp D cuong dp Cau 44: Cho m^ch di?n xoay chieu L nhu hinh ve Biet eupn day c6 di?n R nooooor\ tra khong dang ke Khi khoa k A—CD—' dong dong di^n qua m^eh ch^m pha han di?n ap hai dau m^ch la OOOOuO^ C ^ B — Khi khoa k ma dong di^n qua m^ch nhanh pha han di^n ap hai dau m^ch la — Moi lien h? giua cam khang ZL va dung khang Zc ciia m^ch la A Z L = ( V + l)Zc B Z L = 2ZC C-Zi=-^ D.ZL-(V3-1)ZC Cau 45: Chpn y sai Thuyet lupng tu anh sang c6 the giai thich dupe hi?n tupng A quang di?n B quang dif n ngoai C quang - phat quang D nhilu x? anh sang Cau 46: D$t mpt difn ap xoay chieu, c6 gia trj hi?u dyng 220 V vao hai dau d o ^ m^ch m3c noi tiep gom di^n tra thuan 50 Q, eupn cam thuan va ty difn c6 difn dung thay doi dupe Dieu chinh ty C de difn ap hifu dyng giiJa hai dau eupn cam thuan d^t eye d^i Khi do, cong suat tieu thy cua m^eh b3ng bao nhieu? A 968 W B 1000 W C 500 W D 200 W 319 Cau 47: Chpn phat bieu dung: A MJt Trcri dugrc cau t^io gom hai phan la s5c cau va nh§t hoa B HSng so M$t Troi la nSng lugmg cua no truyen vuong goc tai mpt dom vj di?n tich each no mpt ion vj thien vSn C Cac hanh tinh quay quanh M§t Trai theo cung mpt chieu D M$t Troi dugrc cau t^o gom hai phan la quang cau va quang quyen Cau 48: Xet lie don treo tren mpt thang may Chu ki lie tSng len thang may chuyen dpng A deu len tren B nhanh dan deu len tren vai gia toe a < g C rod t\ D ch$m dan deu deu len tren vai gia toe | a I < g Cau 49: Trong s\ phat quang, thai gian phat quang A la khoang thcri gian tir luc ngung kich thich den luc ngung phat quang B la khoang thai gian tir liic hit dau kich thich den liic ngimg phat quang C la khoang thai gian tCr liic bat dau kich thich den liic ngimg kich thich D luon giong doi vai mpi chat phat quang Cau 50: Mpt chat phong ban dau c6 No nguyen tu Sau ba chu ki ban rS, so h^it nhan l^ii la A.N=^ B N = ^ C.N=^ D.N = 3No B Danh cho thi sinh h9c chmnig trinh nang cao (tur cau 51 den cau 60): Cau 51: Mpt chat diem chuyen dpng tren duong tron c6 ban kinh 30 cm, gia toe goc la 1,5 rad/s^ va chju tac d\ing cua momen l\rc 0,018 Nm Khoi lugmg v^t bang A 133g B.200g C.40g D lOOg Cau 52:-DTa cua mgt xe d^p c6 ban kinh gap hai Ian ban kinh cua lip Ban kinh banh xe la 31,85 cm Mgt nguai di xe v6i toe dg m/s thi phai d^p xe vol toe dg quay A 150 vdng/phiit B 300 vong/phut C 75 v6ng/phut D 50 vong/phiit Cau 53: Ggi lo la cucmg dg chum anh sang t6i moi tnrang;a la h§ so hap thy cua moi truomg; d la dg dai cua duong di tia sdng Cucmg dg I cua chiim anh sang dom sic truyen qua moi truong hap thy A I = Ioe'ad -iod B I = Ioe^ C I = Ioe -ad D I = I(,ae 320 Cau 54: Cho m^ch di?n xoay chieu RLC noi tiep: Biet L = - H ; C = ^'^^ F Difn ap xoay chieu hai dau m^ch u = U^cos(2nft—^) Thay doi tan so f, di^n ap giiia hai ban ty di?n l^ch pha ^ so vai u thi f c6 gia trj bang A 60 Hz B 72Hz C 50 Hz D 120 Hz Cau 55: Tieng coi c6 tan so 2500 Hz phat tir mpt dau tau xe lua dang chuyen dpng xa nguai quan sat vai toe dp 36 km/h, toe dp am truyen khong la 340 m/s Liie tai nguai quan sat nghe dupe am c6 tan so A 2428,6 Hz B 2345,8 Hz C 2456,8 Hz D 2312,9 Hz Cau 56: Dp phong x^ cua ^^C mpt tupng go bang 0,65 Ian dp phong x^ cua g'^C mpt khuc go ciing lo^i cung khoi lupng vua mai ch^t Chu ki ban ciia 6*C la 5700 nam Tuoi cua tupng go la A 3521 nam B 4352 nam C 3542 nam D 3452 nam Cau 57: H^it sa cap ben la A proton B omega C cac mezon D cac hadron Cau 58: Mau sac cua v^t A ehi phy thupc mau sac cua anh sang chieu vao no B chi phy thupc v$t lif u cau t^o v^t C khong phy thupc mau sac cua anh sang chieu vao no D phy thupc v^t li^u cau t^o v$t va mau sac cua anh sang chieu vao no Cau 59: Mpt nguai quan sat mpt ehiee phao tren m^t bien thay no nho len cao 10 Ian 18 s, va thay khoang each hai ngpn song ke la m Toe dp truyen song bien la A m/s B m/s C m/s D m/s Cau 60: Do^n m^ieh difn xoay chieu gom ^ ^ eupn day CO di^n tror ho^t dpng Ro = 50 ^ B WUVVUU w Q, dp ty cam L = — H va ty di^n -'UMMIT^ 271 mac noi tiep Dong di?n qua m^ich c6 tan so 50 Hz Biet di^n ap giua hai dau cupn day vuong pha vai di^n ap giiia hai dau m^eh Dif n dung eua ty c6 gia trj bang bao nhieu? n In % Hir6NG DAN G I A I 2n Caul:B Dya vao thj ta c6: Gia toe eye la a^ax = m/s^; bien dp dao dpng A = 0,05 m TCrcongthuc a^x = w^A :::>(o = 10rad/s 321 Cau 2: C Cau3:A Dp dan ciia 16 xo h^ v$t M va m a vj tri can bSng la A L = ^ ^ i ± ^ = 0,06 m k Khi cat day noi giua v|t m va M thi v^t M dao dpng dieu h6a vai: Me 0,4.10 + Bien dp la A = AL - —^ = 0,06 = 0,02 m = + Chu ki la T = 27t M k 0,4 s 100 Khi do, v$t m se rai ty tu dp cao h => thai gian v^t m ch^m dat la t== 2h = s U =:> So chu ki ma v^t M th\rc hi?n dupe m ch^m dat la n = At = 2,5 — T => Quang duong v$t M di dupe la As = lOA = 0,2 m = 20 cm Cau 4: C Khi toe dp cua v$t d?it c\rc d^i thi l\rc dan hoi bang => v^t qua vj tri can b5ng 16 xo khong bien d ^ g => lie khong the dao dpng theo phuong thSng dung, cau 5: B Khi l\rc hoi phyc bang thi v$t qua vj tri can blng => chieu dai cua 16 xo a vj tri can bang la Ice = 25 cm Khi Ivrc dan hoi bang thi 16 xo c6 chilu dai t\ nhien lo = 20 cm => dp bien d ^ g cua 16 xo a vj tri can bang la Al = cm : ^ c o ^ = A = _10_=200 Al 0,05 Cau 6: D Bien dp cua hai dao dpng Ai = A2 = — CO Ma hai dao dpng vuong pha =>Bien dp tong hpp tong hpp la A = A,V2=-^/2 CO Cfiu 7: C Binh phuomg tan so g6c cua dao dpng Ik co^ = j = 12,5 mco^S'^ Tu cong thijc tinh nang lupng dao dpng cua lac la E = —^—^ So = 1,6 cm Cau 8: D 322 Cau 9: D Theo phuong trinh truyen song => 0,47tx = 2n\ oX = 5m Tan so cua song la f = 3,5 Hz => toe dp truyen song v = Cau 10: A Buac song X, = vT = cm Theo de bai ta c6 M A = 27 cm va M B = 23 cm = : > M A - M B = 4cm = 2? M thuQC eve d^i b^c Cau 11: D Cau 12: C Tir thong qua hai cupn day ti 1? vai so vong cua no Cau 13: D Cau 14: B Theo de bai ta c6: (ZL - Zcf = R1.R2 cong suat tieu thy cua m?ich la Pi = P2 = Ril^ = 17,5 m/s = Ri Rf+(ZL-Zcr = 200 W R1+R2 Cau 15: C Khi k dong m^ch gom R va C noi tiep Khi k mo m^ch gom R, X va C noi tiep Vi dp l|ch pha cua u va i tSng len => X la ty dif n C Cau 16: A Ban dau, U L = Uc nen m?ich xay hi?n tugng cpng huong => cong suat tieu thy cua m^ch eye d^i la Pmax ^ -zr 200 W (1) R Khi thay ty C bSng ty C thi cong suat tieu thy cua m^ch la P= R cos\ 500 W (2) T i r ( l ) v a ( ) = > cos^9 = 1/4 < > = ^ R^ R2+(ZL-Z'C) M$t khac, ta CO U L = UR => ZL = R = 100 Q (ã*) (*) va (**)=> Zc ô 273 Q C= = 11,65 ^F CoZr 323 Caul7:B Cau 20: B Cau 18: D Cau 19: A Tong tracuam^ch l a Z = ^JvJT(Z^~-Z^ = ^ Q cuong dp dong di?n c\rc d^i la lo = — = yJZ A tan9 = ——— R = ^ = > ( p = - z : > u nhanh pha hon i la — N/3 ^ => bieu thuc cua dong d i | n la i = V6 cos(1007rt + ^ )A Cau 21: D Cau 22: B Theo de bai, di^n ap giua hai ban t\ la u = V = —UQ => nSng lugrng di$n truong la W d = ^ W = ^ ^ C U o = 1,6.10"^J => nSng lugmg tir truong Wt = W Cau 23: A Cau 24: A = 2.10"^ J Tan so song ma m^ch thu dugrc la f = 271 V L C di$n dyng cua ty la C = = 50,35 Cau 25: C Cau 26: A De say kho, suai am nguai ta diing tia h6ng ngo^i Cau 27: B Cau 28: A Khoang each giua van sang lien tiep la 2i = mm (vai i la khoangt van) => i = mm Ap dyng cong thue i = — a =:>X = — = 0,5 |im D Cau 29: B Tac6:e.U, = - i l i - va hir^ = ^ ,.U,=-^=> '^Imin ^2min ^Imin *-'2 = L=^x,^^ = 0,l ^ Cau 30: D Cau 31: B Cau 32: D Cau 33: B Do so v^ich phat la nen nguyen tu a muc nSng lugrng thu (n = 3) Theo cong thuc: r = ro.n^ = 4,47.10''" m Cau 34: C Cau 35: C 324 Cau 36: A Kh6i lugrng Co bj phan sau mpt nSm la Am = mo( 2" Vaik=l= T ' 5,33 :=> Am = 0,122mo Cau 37: C khoi lirgrng Co bj phan rS 12,2% 92^U->^i^U+^a + 2^X Ap dyng djnh lu|lt bao toan so khoi va bao toan di^n tich ta dugrc 238 = 234 + + 2A 92 = 92 + + 2Z =>A = OvaZ = - l =>X: °,e Cau 38: C Cau 39: B Cau 40: B Ta CO Ho = XNo; H = XN ( N : so h^t nhan l?ii) H N = 4=>N = So h^it nhan da bj phong _ 3No la AN = Cau 43: B Cau 41: C Cau 42: D Cau 44: A Khi k dong m^ch chi gom R noi tiep voi C =:>tan- = ^ o R = ^/3ZL(l) R Khi k ma m^ch gom R, L , C mac noi tiep ^tan(-^)= R O Z C - Z L = R(2) T i r ( l ) v a ( ) ^ Z c = (V3+l)Zi Cau 45: D Cau 46: A Dieu chinh C de UMB d^t eye d^i thi m^ch xay cpng huong di?n => cong suat tieu thy cua m^ch d^t eye d?ii la = — = 968 W R Cau 47: D Cau 48: D E)e chu ki tSng len thi gia toe hif u dyng g' < g Fqt ngugrc chieu voi P Cau 49: A 325 Cau 50: A TCr cong thuc tinh so h^t nhan l^i sau thdi gian t la N = ^ (vai k = —) 2" T => so h^t nhan l^i sau chu ki ban la Cau 51: A Tu cong thuc tinh momen Ivrc la M = ly =>I = — =0,012kgm^ Y Ma momen quan tinh cua chat diem la I = mr^ => m = 133 g Cau 52: Gpi V] va V2 Ian lugt la toe dp dai ciia diem tren mep dTa va lip coi va ©2 Ian lupt la toe dp goc cua dTa va lip Ri va R2 Ian lupt la ban kinh cua dia va lip Ta c6: vi = V2 o coiRi = CO2R2 o C02 = 2(0i Theo de bai, toe dp goc ciia banh xe la co= — - — = 15,7rad/s 0,3185 Ma toe dp goc ciia banh cung chinh la toe dp goc cua lip = > C02 = 15,7 rad/s => coi = 75 (vong/phut) Cau 53: C Cau 54: A Khi thay doi tan so f de di^n ap hai dau ty di?n l?ch pha so vol di^n ap.hai dau m^ich thi m^eh xay hi^n tupng cpng huong d i | n => 2nf= => f = 60 Hz VLC Cau 55: A Do nguon am chuyen dpng xa, nguai nghe dung yen nen ta c6 f = — = , Hz V + Vs 326 Cau56:C Gpi H la dp phong x^i cua 6*C tugmg g§ H = X,N Ho la dp phong x^i ciia ^^C khiic g6 vua mai ch^t => H© = XNQ Do hai mau g6 cung khoi luprng nen H = —^ 2" N/No = 0,65 =>2'' = o 2T = 0,65 0,65 •t = 3542 nam Cau : D Cau 57: A Cau : A Theo de bai, ta c6 9T = 18 => T = s (T: chu ki eua song) Khoang each giixa hai ngpn song ke la A, = m => toe dp truyen song v = X/T = m/s Cau 60: A Tir gian vecta, tam giac vuong t^o bai UAM, UMB.UAB ta c6 U^Q = UL(UMB - U L ) o Rj =ZL(ZC-ZL) » Z C - Z L = 50 oZc=ioon c= _I_ 121 COZr 7t 327 NHA X U A T BAN DAI HOC S U PHAM 136 Xuan Thuy - Cau Gidy - Ha Npi Di^n thogi: (04) 37547735 - Fax: (04) 37547911 I 21 Chiu trdch nhiftn xuat ban DINH VAN VANG Tong Men tQp : DINH N G Q C BAO Gidm doc : Chfu trdch nhi^m ngi dung vd ban quyen C N G T Y T N H H M T V DjCH V g V A N H O A K H A N G V I | T KHANG Ky thudt vi tinh : NGUYEN MAI DUNG Bien tdp tdi ban : bia: Trinh bay VIET hdnh: Tong phdt THAI CHAU C6ng ty TNHH MTV D|CH Vy VAN H6A K H A N G Vlf T £)/o chl: 2bisA Oinh Tien Hoang - P.Oakao - Q.l - TP.HCM 01:08 39111 564 - 08 39102 915 - 08 39105797 Fax: 08 39^10880 Email: khangvietbookstore@yahoo.conn.vn We: Jte: w\AW.nhasachkl-iangviet.vn LUy$N THI CAP T6C CAC QUdC GIA - M6N VAT Lf DANG BAI TAP IKS CAC DE THI ^•:a so : 02.02.33/66.PT2010 So lU^ng in 2000 bhn, kho 16x24 cm T-ii: Xadng in chi nh^nh NXB GIAO T H N G VAN TAI Dia chl: 92 Nam Ky Khdi NghTa, Quan 1, TP Ho Chi Minh So dang ki KHXB: 1036-2010/CXB/33-63/DHSP 22/10/2010 In xong va nOp IIAJ chieu thang 01 nam 2011 w d m •••••• -Nha sach CAO MINH 36 NguySn Thi Minh Khai Q l TP.HCM DT: 08.38227436 -Nha s a c h KHANG VIET 2bisA Dinh Ti^n H o d n g , P.Da kao, Q 1, TP.HCM DT: 08 39111564 - 39102915 - 39105797 - Fox: 08 39110880 Email: khangvietbookstore@yahoo.com.vn Website: w\AAA/.nhasachkhangviet.vn L U Y E N THI C A P T O G | C A C D A N G BAJ T A P Ttf C A C B £ T M QlKSC O U OkC l>«HG BJU T i p Ttr C A c THI a u c a t -Nha sdch MINH TRi 559 Di0n Bien Phu, TP.Dd Ndng DT: 0511.3723868 103Ly ThaiTd, Da Nang DT: 0511.3824452 L U Y E N THI C A P T O O I L U Y E N THI C A P T O C U T A P TU C A C o f THI QU6c GIA (TOT N G H I E P - T U Y E N SINH) TOAN HOC VATLY IIHOAHOC I CAC DANG BAt T A P TO CAC o£ THI Qu6c OA III! SINH HOC -:5:;:J:E-' U-i (xtfT NGHIEP - T u r i n sum) NG€r VAN HUOfNG DAN ON LtVCN GIAI TICH Hl/dfNG DAN ON LtVEN OAI s d HIidfNG D A N N L U V £ N Hl/OfNG DAN ON LUYEN HlNHHQCGliilTICH Ll/ONG G I A C www.nhasachkhangvie 935092 513416 t GIA: 59.000 ... Ciiu 28) A Ciiu 30 ) A = 2,5 => a = 1,2 mm Cau 29) D Tir eong thurc Ciiu 31 ) C Ciiu 35 ) C he -eU Cau 32 ) D Cau 36 ) C AK > Km = 49,1 pm Cau 33 ) B Cau 37 ) A Cau 34 ) D Cau 38 ) B 215 CS .39 )B M „ - M... kich thich B giam giam buac song cua anh sang kich thich C tang tSng cuong dp cua chiim sang kich thich D giam tSng cuong dp chiim sang kich thich Cau 53) Mpt v^t ran dang quay deu quanh tryc thi. .. thay Cau 30 ) Cho h = 6,625.lO"''''''Js; c = 3. 10* m/s Buac song giai h^n quang difn ciia kim lo^ii la XQ= 0,6 ^ m Cong thoat ciia k i m loai bang B.20,7eV C .3, 31.I0"''J A .3, 31.10-^''''J Cau 31 ) Do thj