Cho biet: DE THI TUYEN SINH CAO DANG NAM 2011 M6n: VAT L I - K h o i A Jhdi gian lam bai: 90 phut H k n g so PlSng h = 6,625.lO-^'^J.s; Idrn dien tich nguyen to e = 1,6.10"^^C; toe a n h sang chan khong c = u= Cdu 931,5 MeV/c^; s6' A-v6-ga-dr6 N A = 6,02.10^^ 3.10Ws; nguyen tijf/mol 1: K h i n o i ve d i e n tii trtforng, phat bieu nao sau day sai? A N e u t a i m o t ncfi c6 tii tri/crng bien t h i e n theo thcfi gian t h i t a i xuat h i e n d i e n truforng xoay B D i e n tri/cfng va tCf triTdng l a h a i m&t the h i e n khac cua m o t trucfng n h a t goi la d i e n tii trtf&ng C T r o n g qua t r i n h Ian t r u y e n dien tii trif&ng, vector cifcfng dien trirorng vectof cam uTng tCr t a i m o t diem luon vuong goc v&i D D i e n tii tri/cfng k h o n g Ian t r u y e n diTcfc t r o n g dien m o i Gial D i e n tCf trifcfng c6 the Ian t r u y e n diTcfc t r o n g dien m o i Vay chqn dap an D Cdu 2: K h i n o i ve quang dien, p h a t bieu nao sau day s a i ? A P i n quang d i e n hoat dong diTa t r e n h i e n t i i o n g quang dien ngoai v i no n h a n nSng li/c(ng a n h sang tii ben ngoai B D i e n t r d cua quang d i $ n t r d g i a m k h i c6 a n h sang t h i c h hap chieu vao C C h a t quang d a n la chat dan dien k e m k h i k h o n g b i chieu sang va t r d t h ^ n h chat d a n dien t o t k h i b i chieu a n h sang t h i c h hgrp D Cong t h o a t electron cua k i m loai thLforng Idfn h o n nSng liTdng can t h i e t de g i a i p h o n g electron l i e n k e t t r o n g chat b a n d i n Gial P h a t bieu sai l a : " P i n quang dien hoat dong diTa t r e n h i e n tiTcfng quang d i e n ngoai v i no n h a n nSng lifgrng a n h sang tii ben ngoai" Vdy chgn dap an A Cdu 3: Hsit n h a n " C l c6: A ncrtron B nuclon 132 C ncftron D proton Giai Chi tig't (Jg thi TS DH, CD Mfin vat l( " Glk\ Hat nhan c6 35 nuclon Vay chgn dap an B Cdu 4: Mot lac dcfn dao dong dieu hoa v6i bien goc a,, L a y moc the nang d vi tri can bang, d vi tri Mc c6 dong nSng bkng the nang thi li goc cua no b^ng: A B ± ^ C ± - ^ D ± - ^ V3 V2 GiSi T a c6: W = Wt + Wa = 2Wt » -mgla' = 2-mgla' ^ a = ± - ^ ,2 V2 Vay chgn dap an C Cdu 5: Mot hat nhan cua chat phong xa A dang dufng yen thi phan tao hai hat B va C Goi niA, ms, mc Ian li/ctt la khoi iMng nghi cua cac hat A, B, C va c la toe anh sang chan khong Qua trinh phong xa toa nSng lirgrng Q Bieu thurc nao sau day d u n g ? A niA = n i B + n i c -i- C niA c* = ma + mc - c B mA = H I B + mc- D mA = — ma - mc c Giai T a c6: Q = (mA - ma - mc)c^ => mA = ma -f- mc + c Vay chgn dap an A Cdu 6: Mot s6ng ccf Ian truyen mot moi triTofng H a i diem tren cung mot phifcfng truyen song, each mot khoang bSng badre song CO dao dong A cuiig pha B ngifae pha C lech pha ^ D l§ch pha ^ G\hi Hai diem tren cung mot phiTcrng truyen song, each mot Wioang bang biTdrc song eo dao dong cung pha Vay chgn dap an A Giai Chi fi^t dS thi TS DH, OB MSn Vat II ' 33 Cdu 7: T r o n g b o n h ^ n h t i n h : T h u y t i n h , K i m t i n h , T r a i D a t , H o a t i n h t h i h a n h t i n h c6 k h o i iMng A K i m t i n h \dn n h a t l a : B.Thuy tinh C H o a t i n h D.Trai Dat Giai Trong b o n h a n h t i n h : Thuy tinh, Eam tinh, T r a i Dat, H o a t i n h t h i h a n h t i n h c6 k h o i liTtfng \6n n h a t l a T r a i D a t Vdy chgn dap an D , Cdu 8: M o t k h u n g d a y d a n p h l n g , h i n h chff n h a t , d i e n t i c h 0,025 m ^ gom 0 v o n g d a y q u a y d e u vdri t o e d o v6ng/s q u a n h m o t t r u e co d i n h t r o n g m t tH triTcfng d e u B i e t t r u e q u a y l a t r u e d o i xufng nkm t r o n g m a t p h a n g k h u n g v a v u o n g goe vdri phMng eua tCf t n i c f n g S u a t d i e n d o n g h i e u d u n g x u a t h i e n t r o n g k h u n g c6 d o Idfn b a n g 2 V C a m u f n g tCf eo d o I d f n b a n g : A 0,50 T B 0,60 T C 0,45 T D 0,40 T Gi^i T a c6: E = ^ V2 = ^