Question

The resistance of a copper wire 200 m long is 21 om. If its thickness is 0.44 mm,its specific resistance is around.

Answer 1

hey mate ur answer is in the given attachment

hope it is helpful

Answer 2

Answer:

1.6 x 10^8 Q-m

Explanation:

R=p*L/A

p=R*A/L=(21*pi*0.00044^2)/4*200

A=pi*d^2/4

1m=1000mm