Fizika8 Uzb i-bob 1-26. pmd

17-§. AMPERMETR VA VOLTMETR YORDAMIDA O‘TKAZGICH
QARSHILIGINI ANIQLASH
(laboratoriya ishi)
Kerakli jihozlar: 3 ta tok manbayi, nikelin spiral, ampermetr, voltmetr,
kalit, ulovchi simlar.
Ishni bajarish tartibi
1. Tok manbayi, iste’molchi — nikelin spiral, ampermetr, voltmetr
va kalitdan iborat zanjirni yig‘ing va sxemasini chizing (64-rasm).
2. Kalitni ulab, voltmetrning U
1
 va ampermetrning I
1
 ko‘rsatkichlarini
3-jadvalga yozing.
3. Nikelin spiralning 
R
1 
=
qarshiligini hisoblang va natijani
jadvalga yozing.
4. Ikkita manbani ketma-ket
ulab, voltmetrning U
2
 va amper-
metrning  I
2 
ko‘rsatkichlarini jad-
valga yozing.
5. Ikkinchi tajriba uchun spi-
ralning  R
2
  =    qarshiligini hi-
soblang va natijani jadvalga yozing.
 
I
1
U
1
 
I
2
U
2
64-rasm