Mqr dbng diQn chay trong ddy denthhng,dai.[r]
(1){r $
trffi
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DE KIE,h/T TR.A X TTET LAFI
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MON: VAT't,Y lX TU
x.- E{oca
A
NHTtr Me iI6: A
I'
co lh:
,fa q_"
g u
si" A"
Sd hat mang di0ra cd rnol nguyCIn rl} Silic
L,205" n 0" h+t B" 24,08, 10'o hat , 6,028
X.010 ha'r
day d5n thhng IvnN ddi (cm) c6 dbng ciiOn I = 5 (A) d+r
ttt tdc d+ng I€n doan day e6 dq lcnl F' - 7 ,5, 10-2N) G6c
I tr6'ng bang.l0-r3
D" 4,816"10rr hat
trong til trudng ddu c6 cilm frng tr) E =
hqp b&i dey IVIN vh duim g chm,ing rD'
D 900
n a\ a2
Xdm sd nguy6n tfr
I
2, KliTi dQ lffi elia e6m wng tir vA dQ l6'n vqn t6e s&adiqn tich A" tdng 4.I6m E " tdrugz lAn c" kh6ng'd6i
3 lvIgt trchung day phing nAm irong r& cuotag dO d&ng di6n di }ldn vh rdn g chrn
A" khong ddi B r6n g Z ldn
cr)ng tfr-ng I6n 2 Xhn dni dE 16n a&a lr-re Lo*rerx-xc
D.gi hrn}lAn '
a
tydtnq
{du,.mit ph&ng khung ddy chfia cdc dudrrg srlc r} Khi gi6m
ung til len Hn thi m6men luc tr) t6c dung IOn khung d6y s6:
D" gi6rn 2ldre
C" [am g 4ldm
4.PhAt bidu nho sau d1y li kh6ng dting?
hlgudi ta nh{n tr} trudrng tdn tai xung quanh dny d6n mang clbng dien vi: A- c6 lur tdc dung ldn m6t ddng di6n kh6c ddt song song canh nd.
E c6 hlc t6c dung I6n m6t kim nam ch6m ddt song song canh n6
c c6 luc t6c dung IEn m6t hat mang di0n chuydn d6ng doc theo n6.
D c6 Iuc t6c dung lOn m6t hatmangdidn dfng y€n ddt bOn canh n6
5 Phdt bidu nio sau ddy Ii kh6ng dfing?
Mdt doan day d5n thhng mang dbng di6n I dit trong til trudnrg ddu thi A Igc t& tdc dung l€n moi phdn cria doan dAy
ts Ir;c t} chi tdc dung vho rfring didm c&a doan d1y
C lr,rc tr) chi tdc dung IOn doan day nd kh6ng song song vdi duirng srlc ril
D Ilrc tir t6c dung ldn doan ddy c6 didm det lh trung didm cria doan diy. MQt doan
0,5 (T) Luc
Ii:
(2)7 DO l6n cAm irng til sinh
A chiAu dei OnF dflY
C dud:rg kfnh 6ng
B MOt diCIm c6c6 m6r day'd5n dei v0 h+n mang dong diQn qSch day -dan d6 50cm.c6 dQ I6n c6m fi'ng ti, la
A A,ApT : B' 0,2PtT C' 3''6PT
9 Chgn Ptrdt bidu dting nhdt'
chidu c&a luc Lorenxo rdc dung ldn h+t mang diCIn chuydn
^.-*tng
v6i chidu chuydn dQng c&a h+r rren dubng trbn-B F{uorrg vr} t4rn *fr? quy d+o h+t tich diem drro::g'
c F{udr-rg vd ram cilea quy d+o khi }rpt t{ch dion 8m"
D X-uGn hu6ng vd tam quy d?o kh6ng phq thu6c diQn tich
10, Chgn c&u sai
M6men ngau lqrc t& t6c dqrng tOn m+r khung day c6 dbng A" ri lQ rhuan v6i diCIn tfclt c&a khurrg a
,u B c6 g,lrri 16n mh&t 1d1[ rnpt phang khung vuong
g6'c v6i
C" cd gL;eri }#m ri5rdtld?i il?At ph&ng khung sol1g song r'6i
D phq thuqc vho cubng dQ derag r$i6n khutrtrg'
tr '1
F{ai day d5s? thlawg, (Chi s*tg- u?ng ych r*taw 32
(A), dbng aie" ch?y trcn day 2IATz= 1 (A) mguqc cfichdtiu hai day" Cbrnul'ng iU tui M c6 dq lmt th:
A 5,0.10-t (T) 8.7,5.10-u (T')
b6.i ddng diQn crr,py ond 9-av h]nq frlr: khon$lpl',u thuQc B.sOvdngdAYcriaOng , x ,\ x
D sO vdng ddy tr6n m$f indt chi$u ddi ong
:,.=:'i 5.r
20cm thi o5 d0 i6n canr u'ng til' 1,27-tT
a,
"MOt diOin
ll.Phfitbidu nh'o sau dAY lI dfng?
A D6 ru' rhicn duorrg rlng v6i tru'dng hqq "y9 b5c cria kim la bln
lQch vd phia d6ng' d0 tu'thien 6m
;;6; r,ne
"u" aic Jiakim Ia bin l€ch
vd phia tav
B DO til thi6n duong ri'ng v6i trurbrng hqrp :q: b,7" cira kim fa bhn
lQch vd phia tdy
' dQ tir thi€n 6m
;ffi;qil;; ii Jd^kim la ben leih vd phra d6ng
C D6 tt rhi6n duong ritrg vdi trutmg hq 9U: bke ctnkim la bln lQch vd ph(a b6c' d6
ti'thi6n Am ;trilr; nn,
"u" aa" Ji,utti* tu bnn
lQch vd phia nam
D DO tt thi€n ducrng rrn[ v6i trudng n* "n9 bac ckakim la b]n
tQch vd phia nam' dQ til thian im
;ffi ;;;;* ii" i""ki-m la bnn lqch vd phfa bic
13.MotsgidAyd6ngc6drrong.kint.o,B(mm),tiiQntr&R=1,1(cr),loqscrnc6chdiQnbOnngodirdt
DDng eoi dny nly dd qudn *919e^la#;il 40 (cm)' Cho Ja'g
aii'
"t'4v quu dng ddv thi cim
6'ng
trong dng ddy c6OOiH n ='A,ZA.iO'.rt"i *ri+ di6n thd & hai ddu
6ng dny lit:
A 6,3 (v) E- 1,1 (v) c' 2'8 (v)
D' 4'4 (v)
14 Nh0n dlnh ndo sau d6y kh6ng dring v6 nam chAm +ho^
-hir.n-n o h*c-n
A Mqi nam ch6m khi nim ty do, ,U" UUrt tf,,;;;4., trirng theo phu'o'n gbic-nam
g Cat cyc kh6c t6n cria chc nam chAm thi hrit
D - 4,8PT
I
dgng trbir ti'tru&ng
Ana haY ddotrg"
diOn d+t irong t& tru;ong cfdu
du&:g srfc
t&-<Iu*b::g sfic tD:"
(crn) rromg l&op glch{,dbng drCIm ch+y rren day x le 11 = chidu v6.i fl""Didrf; nr n6r* r?ong rngtph&ng cf,aa hai day
rrh
c,5,0.10'(T) D"1,5"10-'(T)
fng v5'i
frng v6'i
frng vdi
fng v1i
inong
(3)h
r;
C Narn ch6n: chi hfit dugc s[t'
]'
D I.trarn ch6m th6ng thu6'ng c6 hai cgc
15 Ph6t bidu nho sau dny li kh6ng dring? Til trtrbng ddu lI til trrrirrg c6
A cicdubng sfc sotlg song vl.qdch ddu nhau B' cim rrng tir"t4i mqi noi ddu bing tluu:
c rgc til.t6c dung r6n-cdo Jbng'di-en nhtr nhau D c6c dlc didm bao gdm ci phu'ong 6n A vi B'
16 MOr d6y d6n mang ddng diQn dugcad tri theo niruong 1im ng.ang., c6 chiAu IY^I"'g ra ngodi 'NOu day
a5" rf,i, tut tt t6c duig lc,iaay c6 chiAu ti' tren xui5ng du6i thi cim ring tir c6 chi6u
A tir phdi sans trdi , B' tt'tr6i sang phii
C tt* it0n xu6ng dudi D' tir dudi lOn tr6n
17 Eat m6t do*n d6y d6n t1fus dii l20cm vudng g6c v6i til trutrng dAu c6 dQ l6n cim ri'ng til'0,8T 'Ddng diQn d6y d6n ld}lAthi lgc ti'c6 d0l6n lA - -
-A 1,92N B 1920N c 19,2N
' o('u)
18 Khi n6i vA ph6 Igai b6n dfin, ph6t biiSu ,do sau $Ay li sai :
O.rr"* OU,, a{"-ifrf, iifri6t, *at dg electr6n ts do bing mpt d0 lO tr6ng r
e.i.on[ bdn dfin c6 tap ,hdt, c,ar.hat.t6i dign chri yiiu.duqc t4o b6'i cdc nguyCIn tri'tpp ch6t
A.i;"d bhn ddnlqai'n, *at q? lo triSng lon hon nh.i6u so v6i m!] aqefcl'T,"td"
D.TronE b6n dfln lqaip, mAt d6r electr6n nh6 hcrn r{t nhiAu so v6i m4t d0 16 tr6ng
.19 Fhdt bidu nho sau dAy khdng d:6ng?
A Lrlc tuung t6c glttahai dbng di6n thang song song c6 phuong n5m m4t ph&ng hai dbng diQn va vu6ng
g6cvdihai dbng diQn
p" ftui dbng diQn thhngsorlg song cing chi6u hft nhau, ngu-d c chidu ddy nhau'
C tr-gc tuc,ng tdc glttahai dbng diQn thing song song cd phuong vudng g6c v6i m{t piring chria hai dbng dien D X-r,rc rucrng te" gitruhai dbng diQn thing song song c6 dQ lon ti 19 thu4n v6i cubmg dQ cira hai dbng diQn'
#$
20 MQt electron bay vio kh6ng gian c6 til trudrng ddu c6 cam 6ng tt ts - 0,2
2.10s (m/s) vudng g6c v6i E Lq" n-orenxd tdc dungvlo electron c5 dQ lon li:
A 3,2.10'14 (N) 8.6,4.10-14 (N) C 3,2.10-rs (N) day ctrnghinh chff nhar c6 kich rhudc (crn) x 3 ("r:n) dlt
ch; dbnf diQn c6 cubng dQ z (A) di v]o khung thi momen
lir24 10:o G{m) Cim trng til cfia til trucrng c6 d0 l6nr lh:
E 0,010 (T')
;-hinh rm6ng canh a =
Khung day d.4t
til II46men luc til t6c ts 0,015 (IrTm)
(T,) vdi van tdc ban ddr-r
D 6,4-, 1o-'' (N)
trong til'tru'bng ddu Khung cd ZCA
ngSu luc tU t6c dr;ng vlo khung c6
D A,075 (T)
21 Ndqt khung vbng dAy Khi
gL6 tri l6n nhdt
A 0,005 (T)
22 Khung daY dim cubns dQ n - 2 (A)
cdc ducng chm rmg A.0 (Nm)
c.0,040 (T)
20 (cm) gdm c6 10 vbng d0y, dbng diQn chay m6i vbng dAy'c6
it iroot,E ddu c5 cirm {ngtil B = 0,2 1T1, m4t phing khung dty chfia
dung l6n khung CdY c6 dQ l6n li:
C.0,15 (Nm) D 1,6 (Nm)
til'khuynh vh rn4tPhhng ndm ngang
til' khuynh vh mdt Phfung thhng dfrng 23 D0 til khuynh li:
A e6c hqp b&i kim nam chhm cfia
ts g6c hqp b&i kim nam chdm cria la bhn
(4)tl ) tF-tj
C gdc hqp b&i kim nam ch6m cfia la bhn til' khuynh
D g6c hqp b&i kim nam ChAm cfia la bln tti' khuynh
24 Phdt bidu nio dudi daY lh dring?
Cho mO[ do4n day ddn mapg dbng digq I dat song song v6'i chidu cua dubnrg srfc
t&-X fuJi til lu6n kh0ng, dOi khi tangj cu'brng dQ dbng dign
'
E LUc til tAng khi t5ng cuixrg dQ dbng dign
C X-gc til gi&m khi tdng cu&rg dQ dbng
diQn-D Luc tir'ddi chidiu ta ddi chrdu dbng dien'
vi kinh tuydn dia I1i , { S-i
vi firflt ph8ng xich dad.cfia tr6i dat
ZS "Ntrgn dinh n&o sau C6y klrdng dung vdi
A" Phr,r thuQe ban ehdt dAY d6ry
C" Phr,t thuqe hinh dAng d6Y d6n
28 Mqr dbng diQn chay trong ddy denthhng,dai &i Aidm A cdch ddy c6 d0 l6n2.l0-5 $) Cuong dd dbng diQn ch4y tr€n dAy lh:
duong sfrc tU, chidu cfia dbng diOn cirng chidu v6'i
c6m fi.ng til' sinh b6'i d&ng diqn chpy tnong mQt maeh diQn b6t td' ?
B Phr,r thuQc n"rdi tru'bng xutlg quanh
D" PhU thu$c cu'b'ng d0 ddng CiQm
10 (cm) cim frng tD' dbng diQn gAY
D,50 (A)
26 Ttphd lh: i
.A lrinh hnh crtaci{c dudrng mat sit cho ta hinh 6nh crta cdc dubrrg sric til cira t} trubirrg
t B hinh inh tu'ong tl,c crtahai nam chAm v6i
C hinh Anh tuong tdc giita dbng diQn vi nam chdm'
.D hinh a1h tuone tdc ctnhai ddng diQn ch4y hai day d5n thhng song song'
27 Phdtbidu nlo sau d6y li khOng d6ng?
A Lgc tt t6c dqng lgn m6t doan day ddn mang dbng dien df,t tr)' trubng ddu ti lQ thutur v6i cuinrg dO
dbng di6n doan d6Y
ts tr r;c til tdc dr,rng lgn m6t doan day dan mang dbng di€n ddt trongtil trrrdng ddu ti 1.0 thuan v6i chidu dhi cria
doan ddy
c Lgc iu ,a" dung l6n mQr doan d6y ddn mang dbng diQn dflt til truirng ddu ti l0 thuln vdi g6c hqp b&i doan ddy vd drrbng srlc tt.
D Lgc tt, t6c dung lgn m6r doan dey d6n mangdbng diQn ddt tt trudng ddu ti lQ thuan vdi clm rfng tD'
A.20 (A) B 10 (A) c.30 (A)
Zg gaiday d5n thing, dli'song iong vi c6ch 20 (cm) chd.n kh6-ns,-.dbng di6-n hai diy cing
chi6u c6 cuirng aalrZ' 4(A) vhi, = iO (A) Luc t& t6c dung ldn 40 (cm) chidu dli cria m6i dly l):
A.luchftc6dOlcrnl'6,10-uiN;'-iB'h,rchftc5dQI6nt'o'to"t(i{)
C ltrc ddy c6d6loln 1,6.10'1ht; D luc ddy c6 dQ l5n t'0.t0-o (N)
30 Trong mQt til trudng c6 chiAu tir trOng rangoiti , mQt dien tich Am
tii'tr6i sang phdi N6 ch!u lyc [-o-ren-xo c6 chi6u
A ti'dudi l6n tr6n B til tr6n xu6ng dud'i C, tir rangoiti D tir tr6i sang phAi