Vatan himoyasi

Javoblar:
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Bahosi: ________ Tekshirdi :_____________________________


№2 Laboratoriya ishi
O’tkazgich qarshiligini ampermetr va voltmetr yordamida aniqlash.
Kerakli jihozlar: 3 ta akkumulator, nikelin spiral, ampermetr, voltmetr,
kalit, ulovchi simlar.
Ishni bajarish tartibi:
1. Quydagi chizma yordamida elektr zanjir yig’iladi:.

R

- k -
- +

+ +

2. Kalitni ulab, voltmetrning U1 va ampermetrning I1 ko'rsatkichlarini jad-

valga yozing.
3. Nikelin spiralning R1 = U1/I1 qarshiligini hisoblang va natijani jadvalga yozing.
4. Ikkita akkumulatorni ketma-ket ulab, voltmetrning U₂ va ampermetrning
I₂ ko'rsatkichlarini jadvalga yozing.
5. Ikkinchi tajriba uchun spiralning R2 = U₂/ I₂ qarshiligini hisoblang va natijani jadvalga yozing.
6. Uchta akkumulatorni ketma-ket ulab, voltmetrning U3 va ampermetrning
I3 ko'rsatkichlarini jadvalga yozing.
7. Uchinchi tajriba uchun spiralning R3 =U3/I3 qarshiligini hisoblang va natijani jadvalga yozing.
8. R_o'rt= (R1+R2+R3)/3
ifoda orqali qarshilikning o'rtacha qiymatini toping. Natijani jadvalga yozing.
9. Natijalarni tahlil qiling va xulosa chiqaring.

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