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DE KTEM TRA 1 TIET
MA iI6: B
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f irt6t dign tich chuyen dQng tdn d6u du6i t6c ftrng cria luc Lo-ren-xo , b6n kinh qu$ tt4o cua diqn tich
4 Khi l6p tidp xric p-n duo c phan cgc thuQn, diQn trudng ngotri c6 tdc dgng:
\ f*g cuhng su khudch tr{n cira cdchqtkh6ng co ban
.\h*, cubrng slr kludch tdn cilcl6 trdng tu bdn d5n n sang br{n d6n p
\'Tang ouhng sg }*rudch tim ci,ic electron_tt bdn den n sang b5n d6n p
\\*g cudng sU khudch tdncdcelecffon tU bdn df,, p sang bdn d6n n'
5 MQt khung dey d6n hinh chfr nhat ABCD d{t tt tnrirng ddu c6 cim rtuig tt B = S.tO-' (t)- Canh AB cria k}rung
dii 3 (cm), canh BC dni (cm) Ddng diQn kh;g day c6 cuong tlQ I = 5 (A) Gi6 fii l6n nhdt cf,a momen ngSu h1c til t6c dqng 10n khung daY c6 d0 lon th:
\ 3,75.10-4Nm) W,5.103 (Nm)
\
6 Ben chdtctra dbng diOn chat bdn d6n lb:
\,s5(Nm) \3,75 (Nm)
\ OOrrg chuydn ddi c6 huong ciiac6c electron vh 16 trdng nguo,c chidu diQn trucmg
\bO"g chuydn ddi c6 hu6ng cfiacdcelectron vi 16 trdng ctng chidu diQn
trucrng-\ Dbng chuydn dUi c6 hu6ng clua cdc electron theo chidu diQn truong vd c6c 16 tr6ng
triong.
\ OOng chuydn ddi c6 hu6ng cfia cic 16 tdng theo chiBu diQn truong vi cdc electron trdong
7 Hai didm M vi N gdn mQt dbng diQn ttring dii Khoan g cdchtt M ddn dbng diQn lon gdp biin ldn khoang cdch til N ddn dbng diQn DO 16n cria c&m rlng tD tai M vI N li Bon vi B" thi
\:Ar4
MON: VAT'T.,.!f 11 TdINI{IEN
kh1ng phU thuQc vio
\ mrOi luqmg ctra diqn tich
e.'si Atlj-d6 ldrn ctra diOn tich
\"
B ven t6c ctra di0n tich
\$tn tno6c ctra diQntich
2 MQt.h4t pr6r6ri chuydn {Qng vA v{n tdc 2.106^(m/$ yeo vDng kfiOng gran c6 tD truirng A9.I = 0,02 (1) tfr"o troOrigiq'p vdi ,""to
"er"-,tu g
tD mQt'!6c a0o Bidt $ep t{rcfr cqa
lr+t proton le 1,6-10-'e (C)- hlc Lorenxo
tacaqngrS"riitc6dQl6nh '1t= ifi ! \Iit i'il:*'
4r,z.to"o 1N; \6,4.10-'o 6N; \,2.t0" 1ry \6y''10r5 (N)
3 MOt diy dfin mang ddng diQn duqc bp tri theo phucrng ni:n ngang , c6 chi6u fir {ong ra ngoii .N6u d0y
dA";hi;!" tt ta" iu"g fdn aly cotfric"tirFen xuong auoi thiiem une tir c6 chi6u
\ tt riri sang t6i \* tr6i sang Phai rq.-tin i6n xu6ng du6i Ntu auoi 10n tr6n
\- + \ ':
nguoc chidu diQn
nguoc chidu diQn
Y 2BN hn*-4ts*\
IYI It ,J
N 8,,- 1 B^,
\"tur Z"r BM =iu,
a
(2),9 #
-Q,"a* rfurg tir Ie dai lugng
df,c trung cho tir truong vd mflt tdc dgng lgc
r*.\ oo 16n cria crm rlng phg thuQc vio cuhng tlQ dbng diQn I vx cnieu
dhi do4n da$uan d[t rong $r nucng
&"; ior,
"tu cam rrng tir khong php
thuQc vno dQ 16n cria luc t&'
B "* ung til ld dai lugng vecto
o'-:
9 Mqt do4n d6y ddn thing \m{ d"li Gm) c9-dag 9i* I = 5 (A)
dqt tronq til truong ddu c6 cim rlng t} B = 0,s (T) Luc til t^f,c dsnq len do4n d.y:H;,u#"= 1i6 ih$.'e;;
hqpi6,i aav \ar vi dulng cf;m ung tt
1L:
\soo 900
\o,so
10 Nhan dinh ndo sau d6y 1fi6ry duns vd nam ch6m ' ,^ nhrtnn., hf"-nam
*##*"#rr:m"*tstrfuT#gtheophuongbac-nam
E Mqi nam ch6m d0uhrit du-o' c sdt
{ ffi;hern th6ng thudmg c6 hai cuc'
, 11 MQt s"ri dfly ddng co-au{s.rci{r o,g (**), tll,son c6ch diQn b€n
ngoi'i rdt m6ng' Dtng so-r dly n}y tld
qunn mQt O"g auil?"aiir = +Oi"*1 S6 riog day tren m6i m6t
"nieo dii
cfra dng d&v li:
\ro \nzs \zso \'
tazr
tZ Neu luc rt tac dting l€n doan day ddn
m?*g ddngdiQn td,e2Un tli d0 lg[l c6:n img tit
\* ll*t*s:
'!''
\mx;*
13 Luc nio sau dbtY kh6ng4'il^" lY? * ?
* lff +ffi ;L*fJfii"*t*m*m frH',*li*% dinh hucrne theo phucrng
bic-nam
&,rrt Trai d6t t6c d\mg 16n vfltnflng
\X; rrJaav aa" mang ddng dipn t6c dune 10n
14.Haisqldtygi6ngnhauduo.cu6nthanhhaik*rungdavtrglkhygPo'.-'.yc6mQtvdng,khrrnghaic6ba
vdng N6i hai dau cri nruns ,ao r,ui i.ilffiffiilete* ;o it-.a;,r,re tt
tai tem crialtrung m6J li Br va
,
@X,**'o'{"dpru, \e, =3Bz \''':eBz
1 Tir trucrng Id dang v4t chdt t6n t4i tong
tr'h6ng gian vi
\ tat dung lUc hrit 10n cac vft
-hl'tat aung luc diQn 10n diQn tich
W;; JiliE ru tir 16n nam chdm vi ddng diQn
Q[: :fi? iil lav ii"'a"'a* aa' ;;;";'
16 Mqt do4n dxy df,n c6 dbng_ diQn I nim ngang hu6rn tir rgoii
vno lgne dit trong tt fiubng c6 c6c duong srlc tt thing drmg tir duoi 10n l-u tJia" J-o# tel do* day d6n c6 chidu
\ ttring drlng huong til tron xudng'
\**, drlng hu&rg tt du6i lon'
(3)/n.{
{
/ \ri* nsans hu&rg tu trl|:ans eP' '
{;* "!*g hu6ng tu phui sang tr6i'
.,
-,-r-
j
17 MQt do*n dsy d,n dri.10 !:T) d+, trop p qrs
ddu vi vu6ng-gg: v6i vecto cirn ung ttr' Dbng diQn
ch4y qua aav
"i-Jua,r,e
dQ l,s .,]'";,;#d*,* ,."ttffi #"#if'1i''Jib'
ce* fng til
"t'u ttr trucmg d6
(ffi81" \0,8q \ l'o.) \'zto
nh a = z0 (cm) edq "6 lo"vbng li{*Tg S9*"h+y- *:y;:y;:y;:y;:y;:y;:y;:y;:y;:y;:y;:y;:y;:y;:y;:y;ff'"6'vbng
dnv c6
cudng dQ r 1i tol *ilg aav d#;;s ru iJt !
qc*"0 """rfie * B.iuib, *+t pt'to"s khune
d,v chrla
c6c dudng cam ung ril M6men ,UL'&""iE J,l"fi#$"'g
dev c6 dQ 16n ld:
\.0 (Nm)
m .,rts':{il;;,ilJftte u$r5s:."{6,i; o,*l
\ ,,u (Nm)
19 Phdtbi6u nio sau daY 1)r dung?
, \ rreo nav cuc tt ufc ctra tril yt 13m q 01"^Y:: lrlc
til nam cfia nel ddt nirn tai nam cuc
\rr,up nay cuc t.r b{ cfia trdi ddt nim tql nam "u", J.I" ,u;*'
ct.affii.a*tnfon t+ b6c cgc
\,fiap nay cgc ttrbf,& cla o.*o,n,m ;dn bic cuc' cuc
tU nam cfia trdi'ddt nAm gdn nam cgc
\Yre.rnayc*cttbaccfiatr6iddtnimgf,nnam*' jnt*namcfiatr'iddtnimgdnbiccgc *- -L-*
1tr& R = 1'1 (O)' 16p son c6ch iliQn bOn ngod'i
rdt mdng'
il#:Hr,tr##:Hdry;ffi ibffi fiffi ,+l*irfflild;a;ra1*i*mEs"uen
il;8;si;y "d.u,ff;r# qr,- ryl ' \r,r {vy
5T': ^ -i:;engoiL nqot dien,ch am crry.e1ags ry"g.Tl-:11" 21 Trong mqt tirrmdngr6*_Y*^i*"6f*
ruYe *:Y:::,.-
-$r phfi td;6i N; tht'" lsc Lo-ren-xo
c6 chi€u
t.n xu6ng duoi
\r*ffi':l#e \rta'*gpna
2l.Lttrclorenxold a- ra-^ +.^nc rr'r ffltdns.
\ luc til r6c dgng 10n h4t mang diQn chuydn dQng tu
trudng'
** drtf,c dgng 10n dbng <li€:r' .-,
r,,*c,An trons tU trutmg
\ fU tir t6c a,lng ; ttat t*S dic'n d4t dfng yen
tt trutmg
\ ,n ttr dbng dlQn n}y ta" al"tg 10n dbng diOrr kia'
$lgffipl* ' ddy t5ng Z tln ntnmg -s6 v6ng dfly vi chi6u dai
6 24 Khi cucvne dQ ddng diQl Wqlli*'u dulne kinh
6ng
(4)z\{
.c f
;
25 MOt ktrung d4y mang dbng diQn d[t rong tt truong ddu, m{t phang khung dS vuOng g5c v6i aucrng tem
rtoig t& fgt lufln nlo sau d4y ltr drlng vd lgc til tdc dgng t€n cdc,cflrh cfra khung dfly
\o*, krrong
N"a- rong m{t phing ft*rung dfly,'vu0ng g6c vdi cdc canh vh c6 t6c drpg k6o ddn l*rung
\nu* trong rh{t phf,ng lhung dfy, vu6ng g6c vdi c6c canh vh c6 t6c dung n6n khung
\p vd C dung
26 MQt day d6n th8og dii c6 ddng diQn I ch4y'qua Hai didm M vi N nAm ctng mQt m{t phf,ng chrla
dfly dan, ddi xrforg v6i qua dfly Kdt luan nlo sau day li tr*rong dting?
\Vecto c&m rnrg tt t?i M vh N bAng
\em rrng til t4i M vh N c6 chidu nguoc
27.I<hicho hai day ddn rorii.org ddi v6 han crich a, offiB hai ddng diQn cturg dO 16n I nhurg ngugc
chiAu thi cim *g ti, tqt gi,p tfi{m nern m{t pheng chria hai dey y.a 96ch d6u hai dfly c6 gie ni ld, \ M vh N ddu nam fiOn mQt ducrng sfc tt.
\)Cam trng til tai M vh N c6 dQ a lon bang
yloTvza fi8.10-7ua ffla-7Y4a
z}.Hildey d6n thflng, dli song song d{t trong kh6ng k}rf Dbng diQn ch4y trong-hai ddy c6 ctng cuong dQ
(A).LUc ni tac d+ng len m6i m6t chidu dii cria m6iday c6 dQ l6n te 10'(ry Khoang cdch gifia hai day d6 li:
\ ro (cm) - \ 12 (cm) \ ts (cm) \Zo (cm) \\,-\\
2g.Phdtbidu niro sau dEy li dring?
{ ; ;;;;;** k*ri crp bic cfia kim nam chtm cua la bhn nrm dudi m{t phing nBmB, iIQ tU L:truynh am
S1rlU6" cria kim na* c[a* cfia la bbn nim phia tr€n m4t ph8ng ngang
\oqrrl.$uynh duong $i:s:]to,"I" ET,111r:t3.::l!-!1"tu tren m{t phE ,g neme, dO tt khuvnh nm cr,rc
$8"
"hu kim nam chAm cta la bin nim
phia dudi m{t phfrog ngang
\OO tt khuynh ducrng crpc bic cfia kim nam chtm cria la binlpch vd hudng bic, dq tt khuynh am crlc bic cria
^kii, nam chflrie cria la bilr lQch vd hudng nam
i;; ;il;;uo*, cgc bic cria kim nam chtm cria la bln lQch vd hu6ng d6ng, dQ tt khuynh am crlc b6c cfrbt<im nam chAm cria Ia ben lech vd hu6ng nam
30 Hai day d6n th&r,g, dii song song c6ch nhau3? (cm) kh6lg $i $Ong diQn ch4y gen dfY 1 li I, = J
(A), dbng aign ctr4y tren dey [m\= t (A) nguo c chi€u vdi I, Didm M nim tong m{t phEng cfra hai d0y vi
\ 7,s.lo-7 G)
c6ch ddu lrai dey CAm rtorg tit t4i M c6 dQ ldtn li:
' \,s.rou(T) \,o.lot(D O