TRuol.rGDN
HQC
SUPHAM
TP. HCM
on
rm 16r NGrrrEp
D$r Hec np cuiNH
eur
NAvr
zlr.L
Ngdnh ddo
tpo: Vft
ly hqc
Hqc
phAn
thi: Phuong
ph6p ghi
nh$n brlc x4
Thdi
gian
ldm bdi:
150
phrit
khdng
te tnOi
gian ph6t
dA
DINH LUaT
Ti Lp NGHICH niNn
pHuoNG
Kr{oANG CACH
Ciu
1
(1
tli6m).
Ph6t bi6u
vd
chimg minh mQt
c6ch tryc
quan
dinh
luflt ti lq
nghfch binh
phucrng
kho6ng c6ch.
CAu 2
(2
tli6m).
g6
tri mQt thi nghiQm
ee
n6m chring dinh
luQt
ti
l0 nghich
binh
phuong
kho6ng c6ch. C5c budc tii5n hdnh.
Cfru 3
(3
tli6m). DC nghi mQt hq do
ghi
bric x4
dtng
trong
thi nghiOm trOn.
Giii
thich
sg
ho4t tlOng oba cdc kh6i chric ndng
trong hQ
do
ghi
tr€n.
CAu
4
(a
di6m). Sau khi thi nghiQm nguoi
ta c6 b6ng sO
tie,r sau
ghi
nh6n t6c dQ
d6m
theo
khoing
c6ch til nguiin
ph6ng
x4
d6n detecto:
-
Thi sinh
tlugc sri dung thi liQu
vir miy tfnh khi lirn
bii
-
Cr[n
bQ coi thi kh6ng
giii
thich
gi
th6m
Hg
t6n thi sinh:.
. . SO
b6o danh:
Khoing
cdch x
(cm)
t0 20 30 40 50 60 70 80 90
Tdc ctO
dtim
R
(s6
il6m/phf0
27098
5825
2943
1323
89s
733 499
415 314
Xdc tlinh
phucrng
trinh cria
dfnh
luQt.