Question

The length of cylindrical metal is 1cm and radius is 2.0mm if 120V potential difference applying across the of the rod than find out the electric current flowing it

Answer 1

Explanation:

v=120

l=1

r=2 ,

pi r^2 = a

22÷7×2×2

88÷7=a

12.5=a

R=rho.l÷a

1.7×10-22÷12.5

0.136×10-22

i=vr

i=240