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Be-clrio pUC vi Df OTAO
flJ{'eTmlff'
rY rru
cHQN HQC sINH GIOI QUOc GIA THPr
NAM 2016
M6n: V{f Li
Thdi gian: 180 phrit (kh6ng kA thdi gian giao
Ngiy thi thf hai:0710112016
foeini cd 0i trang, gim 05 cdu)
dA)
Ciu I (4,0 didm).
Va; gina ttr6 kli
19, nha khoa hgc Fu-c6 dE lih6o s6t chuy6n dQng cira
mQt con l6c c6 c6u tAo tuong t.u nhu mQt con l[c dcrn. Cdn crt viro chuy6n
ring Tr6i
d6. ng ctra mat phfing dao dQng ctra con lic, 6ng d6 chimg t6
Oht-tU qouy'*ung quanh trlrc cira n6. Con lic t16 gqi ld con l6c Fu-c6.
Trong Uai nav ta wrao s6t chuytin dQng cira con l6c, Fu-c6 du6i dang
chuySn dQng cira mQt con l6c dcyn trong he quy chi6u quay du-o. c d{c
tnmg boi lgc qu6n tinh C6-ri-6-lit vi du6i t1c dung ctra trgng lyc.
rai mot noi c6 vi d0 rp tr6n b6n cau Bic ctra Tr6i E6t ngudi. ta treo
mQt con lac don.khOi luqng M, chiAu ddi l. G-pi O ldri tri cdn bing cira
v6t M khi con l6c dung y6n. chgn hQ tqa ttQ oxyz g6n c6 dlnh v6i Tr6i
Hinh
E'6t -44, phang O*y nfim ngalg song song voi b6,m4t TtdiDdt, tryc Ox
tryc
q]u
O;
di6m
vi
tuy6n
Eucrn[
tt.o t.rOng OO'ng,va ti6p. triyerivdi
4i
oy theo hucmg naryIiiAp;tt" roiiooig kinh tuy6n oi qru di6m oi tryc oz di qua t6m Tr6i E6t
(Hinh 1). Do Tr6i EAt t.o quuy quanh tryc cria n6 vpi vfln t6c g6c 6 (c6 phucrng trirng vdi tryc qulY
Nam t6i dia cgc Bic) n6n hQ tqa d0 da chgn cfrng quay voi vfln t6c
.t u frai D6t, chiAu t" Aiu
"ri.
goc 6. Khi v6t M chuy,Sn d6ng v6i v4n t6c sE chiu t6c dlrng ctra lgc C6-ri-6-lit theo cdng thric
p"=-zru(6xv). Trongd6 6xv lekf hiqutichvdctootrahaiv6cto 6 vd V. frrc F. c6phuong
i
vu6ng g6c vdi mpt ph[ng chira
Fv =
-2M(r"r* -o*v,),
6 vir v vi
F, = -2M(ro-v,
c6 c6c thanh phAn
q=-2M(rru,-r,rr),
-orv*). cia thii5t vOt M chi chiu t6c dung cria trgng lpc
cira d6y treo. Gqim4t phdng chria
lcoi g}n dring hu6ng theo phucrng Oz), lgc. C6-ri-6-lit vd lgc c[ng
tryc Oz vd d6y tr.o".iru .o" f8. [ *ii phing dao dQng. Coi bi6n dQ g6c cira con 16c ln nh6, vdt M
,Ti.rrrva, d6. ng trong mflt phang oxy va AO ron ctra thdnh phfrn luc C6-ri-6-lit theo phuon g oz lit
r6t nh6 so vdi trgng lgc.
l. 86 qua sy'thay d6i tAn s6 dao dQng cua con lic g6y boi t6c dung ctra lyc C6-ri-6-lit. MO ta
.rr*Aridre ;,i"-*i, ptri"Jauo dfng vp ic pna. d.ans euy deo cira.vflt Y tl", TAl pry"s,oxv trong
f.f,"arg thdi-gian Uing r c[u ki. Bi6i rang thoi di6m t = 0 v4t M o tli6m o vi c6 vdn t6c ban ddu
theo chi6u ducrng OY.'
hutmg-H;i
-";.
tur C6-ri-6-1it theo phuong Ox vi Oy c6 thO vi6t dudi dpng: F. = Mbvyvd
,h;"h ph}"
",t
(cho vi dQ
0 khi
tir A i6i B cirng chi6u 4oorrg quy u6c vi ngugc
t :,
m6i truong trong suotc6 chi6t
1. cho m6t chom.A";eiirh R, t6m-c, dinh s, ngrn cSch hai
;.it*OiaiA. s6ng o trong *oi t*o'g chii5t su6t n1 Qua luong ch6t ciu se
su6t n,, n, kh6c
S, C, Aznim trCn cirng mQt duong thing' Bi6t c6ng thric
t+o 6nh ta Al6,m A2 (Hinh 4). C6c di6"t
l4i)'
^. .
,il.
tl,
n'CA' n'c42. trong
ld mot di6m t6i nim trcn chom cAu phan
d6 Ir ltrons do
cs ba,n cua lu6ng chdt cfiu -:=-*-,
IAr lA2
c6chgiftahaim6itruong.
.r r
1.1rri,_ 4^ -r,
a) Chrmg minh c6ng thirc li6n hqp ctra lu6ng chflt c6u c6 dudng kinh khdu dO nh6
nt
:-::-.
sA'
n2 _ flr -fl2
,li,.r.,irir" di6m A, tron dulng thing di qua S vd c. Khi diem Ar dan tFB
+F
llinh
1.
2.
Hinh
3'
t6ng.
kign Ez. cudmg dQ ph6t brlc xa s6 tflng nhanh ]rhi higu dipn th6 u
kiQn c6 hiQu tli9n thti
Linh kiQn E2 c6 d6c tinh sau: Khi hai dAu A vd B (Hinh 3) crla linh
vao
bi,,at ri*,
'i:
hlu^"
cho thanh phen
uas thi ugn* qua linh kien c6 d4ng: I^" = Io(effi -1)+Irv6i Iu dflc tnmg
kh6ng nhgn elugg birc xa chii'u
ddng tripn sinh ra do sp chi6u brrc x4 vdo linh kiQn (Ir= 0 khi
ilntr men du-o.c
io'ia ne s6 eac tryng cho linh kiQn (16 > 0) vi coi td kh6ng o6i. rcri
,i"1,
chii5u brlc xa 6n dinh
thi Is krrong e6i va trong truomg hqp chiiSu bric x4 manh trri lrnl>
tu.
yK ). T h nhigt d0 ruyet e6i ve n h he s6 d6c trmg
k ld hing so Boltzmann (k = 1,3g.10-23
crla linh kiqn (n, O), lqlh d0 lon tlign tich cria €lectron.
2. Dqng cg
- 01 hQp kin X c6 5 dAu ru (duqc cdn bA coi thi phdt)'
Hz, diQn 6p ra:
- gi6nth6 ngudn: Stl dqng ngu6n diQn xoay chi}u 22OV- 50
+ EiQn 6p xoay ohiAu (5 A): 3 V; 6 V; 9 V; 12 V'
+ DiQn 6P mOJ chi6u (3 A): 3 V; 6 V;9 V; 12 V'
th6 di6u chinh li6ntuc.
- chi6t 6p ttiQn trl: EiQn 6p vdo 6 + t2v, diQn iryrumOt chi6u c6
- Bi6n ff& con ch4y: Co ttr6 thay tl6i tir 0 Ct d6n 100
- 02 dbng trO Co etiQn tla ndng hi$n s6'
- BO dey n6i eien: BO 12 sqi d6v ntii co phich
cim'
o'
- Trong qud trinh do dqc liiy
sd liQu, luon
di nit
clru1,6n ntach tr€n bi6n thd ngu6n
*ng
vdi lqa chpn dAu ra 9V dii bdo ve cdc linh kiQn vd ,gu6r.
- pe do (J, s* dung thang do 20 V vd 2 V cia v6n kd; ad do I, sn d4ng cdc thang do mA
cua ampe kd. Hqn chd stb dung thang do pA cia cia ding hi ao di€n niiu khdng thqt ciln
thi€t,
-
Sti dqtng
_E
cac ki hiQu du'di ddy khi vd so
L
r-,_ _-F
chpy
Bi6n thi5 ngudn Bi6n tr6 con
4. YGu cAu Drm
C6u
dinh
DiQn
tr&
di
mqch di€n s* dung.
lj i;t fr+ @ e
l--l-
I
HSp
kin
:t*rf
Ampe
I
k6
V6n kii
bii thuc hinh
I (0,8 did@. Kh6o sit d{c trung V0n-Ampe
ctia linh kiQn D2
btc xp, su dUng bi6n
lfti
dugc chi6u bfc x4 6n
mic 0 ch€ dQ phan 6p
O6 t6y
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