tty thuQc vfln tdc cfia 6nh sdng trong hai m6i trddng B... Dbng iliQn gi{m nhanh.[r]
(1)'i lf/{
TRTX}NG T}rPT Cfin Giu6c
Dd KrfiM rRA s6 zHKtr
Mdn: Vflt li lL NC ; OB I
Thdi gian ldrn bdi: 45 philt; H,ffi ,*'ou'w'ffi:r#,'
.Di6m
bq Jo
98U-1: Mqt tia sdng di tU ntfdc (chi6t sudt n) fi,Oog vdi g6c tdi i th6a di6u kiQn sini < l/n Kdt luf n,nio,sau ddy lI tl6ng?
A ToAn bQ tia s6ng ddu khrlc x4 k*r6ng
B, Mgt phda tia s6ng bi philn x4 vi mQrphln bi khfc xa vdi g6c khrlc x4 ldn hdn g6c phin x4' C.Totrn b$ tia sdng sE philn x4 toin phln vio nrtdc
D M6t phln tia sdng b! phin x4 vi mQt phdn bi khrlc x4 vdi gdc khric x4 nh6 hon g6c phin x4
GE!: MOr ria s6ng c6 riltdng ruydn qua m6i brldng sudt d{t tidp gi6p nhuhinh ve Hfiy s6p xdpchi€1t,sudt cria c6,cm6i firfdng theo thr1 tg tlng ddn
A.nr(oz(IIr
C.nl(nr(nz
C giflm di 30"
B riz ( I'Ir ( flr yDr (n, <*
-D tf,ng th6m l5o a
, C&u 3: T6c dqrng c&a hp tt l€n khung d0y c6 dbng diQn dugc fng clgng truilmg hqp A M6y phdt tfie.n mQt chidu B DQng co ili-On rnQt chidu'
C ampe kg nhiQt D la bhn i
CqS 4: ! Chidt sudt tf ddi giifa m6i rrrdng khric xA va m6i trddng tdi thi
A tty thuQc vfln tdc cfia 6nh sdng hai m6i trddng B lu6n lu6n nh6 hdn l.
C tily thirQc vio g6c tdi cria tia si{ng
D, ludn lu6n ldn hdn l.
@-5: Cnidu mQt tia sdng til kh6ng tdi bd m{t crla mQt m6i tn/dng iudt c6 chidt sudt n= .t6 vOi g6c tdi i= 45' Mudn tia khfc x4 vi tia phf,n x4 vu6ng g6c thi g6c
tdi cfra tia tdi rOnphdi:
A, tlng th€m 30" B giflm di l5o '
\ {'t L7"
1 rr4 r,c
B tB thOng qua m+ch biOn thiOn thes th$i'gi'arl
!r
CA$ {: Trong mQt mqch kfn , d0ng diQn cam fng xuflt hiQn :
A M4ch diQn dugc d{t trong tir truOmg ddu
(2);
c' Mqch diQn dugc d+t mor til trudng kh0ng ddu D m?ch c6 rnQt nguein diQn.
B Do?B dty df,n,,chuydn dOng cm cfucduong sfc ril
D, khung dey q$at,rrong tt tiudng
Eo
D e," = 0n05V
100J Dbng diQn qua Ong dey c6
D.tr=400,{.
E I=0,75A. C.f=1,25A D"I=7,5A.
B.F=I,25N. C F =0,75N. D.F=!2,5N.
Sa$ $$l M$ffiffic6 chidu dii socrn, , titidt dipn ngang cfia dng li l0cm2 rr€n dng diy ngudi ta {u{n l00vdng HQ sd
A,:L='Offit[ffi,H. B.L=0,25.10-3FL C L = 12,5.10's FI.
r\ tt-'v{Eittrkf :flr Ir L=U,Z).IU-tl C L= l/r5.l0"H .D L= 12,5.10-4H.
cig lq Mqli ,9&rn c6 ff cam L = 30mH, d6 dbng diQn b,idn thien ilcu dfu t50A/s thi xudt di€n d6nr
c&mlffitfi$rrtdffi"rri
l50A/s thi xu6t diQn dQng qr
4._e*,it4"li!;- B e," = 0,45V C.g" = 0,045V.
ciu,4E;.Msr,'61rgdey c6 dQ fg c&rn L = b,iH" Nnng lugng tfch lu! trong dng dey h A I =TA.
S,e,ry X,f :, Chgn,e4u,ddng
B"I=0,2A. C tr =20A.
A: ftitliddgrhd+irutrg lu0n luon.duong B TU thong qua mQt m?c!r,:kfn bing khong
q+lz1Chon:,91ucdu.e.{-ctmachdiqnnhuhi,nhv6,dichconch1ysarig6ent'ii. -
* Iyq,S*SSv I!,ons c6 dbng diQn cim 6ns vi khung rlong-auq ndi vf{ngudn dign
s lr€ugBuqgaay [h9ns c6 dbng dipn cim rlng vi tt thong quikhung khOng ui-gn adi.'
c frosg.,khuttgdf,y
ludt hi$q ddng diQn cim fng vi ddng aign qua dng aay ,tng , ngn ttr th6ng
xuy6n qua,ktrrung ddy t[ng.
D Ttorrg khung:da{Tual hign d}r8 di$n cam ilng vi ddng diQn chay qua dng dey giim n€n til
th6ng xu14n.qua khung dey giAm
?eul8: Iftung&y,dfln AB€D rttt gdn dey d6n thing dni c6 dbng diQn I chqy qua Trubng hqp nio
;au dflylrong khuag dey ABCD kh6pe xudt hign dbng dign cnm rlng
1 It4 ti6nkuuug0ey ABCD theo phuorre songiong v{i dey Jen rn*g ddng di0n I
c Dich chuydn lshung day gi gdn dbng diqn I. D Quay khung d:ily quanti rrqriOo,.
&r9irmt uleu 4o!ai, dnv h sai ? sudt diQn dOne tg cim c6 gi{ tr[ l&r khi :
A' D0 trr c'im cfra dng dsy ldn' B cudng {Q dbng diQn
cria 6ng dey ldn
(3)'a cau wong 20: g6c MQt vdi dtrn diQn dii 20cm tinhti6n tx trudng-ddu , grirn rlng tt B = 5.10* T v6c o v1n tdc cira
v6c to cim rtng til vi c6 dQ l&r.Sm/s Sudt tlign ilQng cim rlngiu{t hiQn trong ttianh c6 gid rri :
A lr"l =s.t,av B.le"l=s.rouv -:c
l;;,1:;,; ; o p,i=o,os r.
Cflu?JJ: MQt vlng afr r.trf,nc c6 diQn tich gifi h4n 80cm2 d4r ffTq tttrudng ddu c6 &rn ,tng tU B = bj.ro;T vh vu6ng
9* d{3} phlng cfia vblg lay vdc to rm rni ru dgr ng.ix odi h;6";;rti1ai, ,s adi hutttsdidn rong rhd{ gian l0'' s $dt die.n dQng xudt hiQn trong khung lil
A.e.=4,b.10''V B.e"=-d,48v C.e"=4,g.10-3V D.e"= O,Z4V.
C*?: M6.t thantrdfin tliQn d]i 20cm dugc ndi hai dliu cfia n6 vfi hai ddu do4n m4ch c6 rlign tr& 0,5C1 Cho
chuydn ilQng tinh ti6l trong tt trudng tryu cf,m.rfoig rir p =6,99 T u6i o4n rd ,*/, Bidt v6c to vin tde cfia ttranh vu6ng g6c vdi v6c to cim fng tlr vt diQn tr& cfia rdt nh6 Coi v{n rdc cria thanh wong g6c vfi aay O[n E&ng die.n qul
diQn r&li:
A I =2,24A. B I = A,448A. C I = 0,112A.
s* dvng dfr HQn sau cho cdu 23,24,25 cho m+ch dign nhu hinh v6 Ngudn diQn c6
sudt diQn dQnS & = 1,5V , di$n tr8 r = 0,1O Thanh,MN dii lm c6 dign tr& R =
?,9P Til ru&lg g0,.v6c to E thing e6r yfi MN vtr hu6ng xudng du6i cim rlng tt li 0,1T Ampe kdc6 diQn tr&khOng ddng kC
s Ciu 2.i: MNdrlng y€n, sdchi cfia ampe kdli:
A, I - l5^A, B I - 1,5A C I = 0,5A. D I = 0,15A.
C$+ryi.MY:ly.dl ipngd{ vd ben-phil (hrrtrne xa Eo) vdi vfln tdc v = 3m/s cho hai ddu N vi iVlluon tidp xric vdi hai dd blng kim loai , sd chi cfia ampe kdli:
A.I=0,4A B.I=o,iz^ C.I=0,36A D.I=0,3A.
' 94+25: Mudn tho aqne-
!d "l,i d phni Id MN chuydn ng vd pnfu uao ua "pn tdc bao nhieu f chqn kli,q, A drlng
|.-$"vf" {Ans vp phia phf,i vfln tdc v = 1,5 m/s
^
B Chuydn dgng vd ptri"
"ai "arior ;= ii */r:
C.'Chuydn dQng v0 phia phai vfi t& v = 15 m/s O Cnuy&,o6n]g vd pfrfa tr6i ;Cn ro,
" = 15 m/s
' J - -_i
Qeu ?,6: M0t ngrfri nh'in xudng diy mQr ch{u'nrr6c (n = 413).Chidu cao cua l6p ntr6c chdu li 20 (cm) Ngrrdi d6 thdy d6y ch$u duUng nhucdch m4t nudc mQt khoing blng
A 10 (cm) B.15cm C.20cm D.25cm
' 9?u,?7 rMOt ban hai m{t song song cd bd d}y (cm), chi6t sMt n = 1,5 drro-c d{t kh6ng kh1 Didm s6ng S er{oh b6n 20 (cm)
inh s' cta s quaban hai m{t song song c6ch ban hai mflt song song m6l khoing'
: o -
-A 10 (cm) B.14cm C.l8cm D,22cm
Clq
3,St M.oJ midns 96 trtnh trbn, b6n kinh (cm) & tlm o, cim thlng goc m6.r dinh oA Tha midng 96 ndi rrong mo.t chflr nrrdc
c6 phidt sudt n = 1,33 Dinh oA & nudc MEt d{r khong tcnr,-c[idu oii ton nrrdt cria oa ;6:",4 *u* rpfr;au A Ii:
A OA = 3,25 (cm): B OA =3,5 (cm) ' C OA = 4,54 (cm) D.OA,= 5,52 (cm)
9eU2: Chidu mOJ chim tia sdng song'song khong kM tdi m{t nu& (n= 43)vfig6c t6i h 4S G6c hqp b6i,tiakh{ic x4 vi - tia tdi li:
:
A D =70032'. B D = 450 C; D =zso3T' D D= IZo5g,
Cfu 30: M$t soi quang hqc hinh tru,, l6i c6 chi6t sudt n1= 1,5 PhAn v6 bgc cO oitriiSt sudt n2 =.,D .Chi6 tia,tdihQi d
m$t trudc cta sgi quang vdi g6c d'nhu hinh vE Xdc dinh a dd tiasdng cria chirm truyAn a"q il; 6o]9,'-''
-"
-Ala=300
D I =A,224A.