Question

A wire is 1 meter long ,0.2 mm is the diameter, resistance is 10 ohm ​

Answer 1

Explanation:

here it is given :

I=1m,d=0.2mm=>r=0.1mm and R = 10ohm

by using formula.

R=pl/A

=pl/πr²

therefore ,p=Rπr²/l

=10*3.14*(0.1*10-³)²

hence. the resistivty of conducteris 3.14*10

Hope it helps you