Vatan himoyasi

Ishni bajarilish tartibi.
1. Tok manbayi, reostat, ampermetr, voltmetr va kalitdan iborat bo'lgan zanjirni yig'ing.
2. Elektr zanjir sxemasini chizing.
3. Kalitni ulang va voltmetr ko'rsatgan U kuchlanishni jadvalga yozing.
4. Reostat surgichini sterjen bo'ylab bir me'yorda o'ngdan chapga va chapdan o'ngga suring. Bunda kuchlanish o'zgarmaganligi, lekin tok kuchi bir me'yorda o'zgarishini kuzating.
5. Reostat surgichini sterjen uzunligining 1/4 qismiga suring. Ampermetrning I1 ko'rsatkichini yozib oling. Om qonuni formulasidan R1=U/I1 qarshilikni toping.
6. Reostat surgichini sterjenning o'rtasiga suring. Ampermetrning I2 ko'rsatkichini yozib oling. Om qonuni formulasidan R2 =U/I2 qarshilikni toping.
7. Reostat surgichini sterjenning taxminan 3/4 qismiga suring. Ampermetrning I3 ko'rsatkichini yozib oling. Om qonuni formulasidan R3 =U/I3 qarshilikni toping.
8. Reostat surgichini o'ngga sterjenning oxirigacha suring. Ampermetrning I4 ko'rsatkichini yozib oling. Om qonuni formulasidan R4 =U/I4 qarshilikni toping.
9. Natijalarni tahlil qiling va xulosa chiqaring.

№	Tok kuchi, A	Kuchlanish, U	Qarshilik, R
1
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3