Lf thuv6t : cdu I i'rri'h bAy nOi dung Djnh ru0t Kir.chrroff .v'grrTa cta tlirilr ruft.
Trang 1:
on rm uoiv QUANG ( L6p crJxnAN
)
lql &
Hqc kj,II Ndrn 2006_2007 ( DC thi Hn I) i
Thdigian 120 phrit
I Lf thuv6t :
cdu I i'rri'h bAy nOi dung Djnh ru0t Kir.chrroff .v'grrTa cta tlirilr ruft.
Cffu 2 : Trinh bAy nguy€n tic ho4t dgng cta au.ng kl .
II Bii t6p:
cfiu I : Cho rn6t flr6u ki'rr dAy chitit su6t N = I,5 hai mut r6i c6 brtur kinh len luqt
re 20cm vd 80cm <t[t trong kh6ng khl Ba div d t6m cria th6u kinh ta zo;- ;u;;;t'nh6
g6c vdi t4rc chinh vd 6 tru6c rndt ciu thf nh6t 60 cm.
;"rJ;ij6ng
thric mflt cau khric xs x6c dinh vi tri ,ti'n ch6t vd rlQ ph6ng tl4i cra a'h qua b'coi th6u ki'h dAy rtuong duong m$t qua'g h0 <Idng trrc X6c tlinh 4 di6rn dac biet cria
quallgh0.Ki6rrrhalaiki5tquricdua.V€lrirrlr.
Cf ir 2 : Tia Rongheii c6 budc s6'g i:0,20g A0 bi tian x4 b6i Cacboii.H6y xr{c tljnli :
a.Budc s6ng l.' cria tia Rcrnghen tfur xa dutii g6c 900
i brDdngrrEng ctrc dai c,.ia elccrlon.
^t\, ; /i,rr\
#, I \ t, L
-1L l0
- ii ( Kh6ng fugc sri dung tdi ligu) + d - "
t\
{",{)f}.t;*''
,', 1r', l' - ,r'-'u t t, , - ///T
s