Question

If length of a cylindrical conducting wire is doubled and area of cross-section is halved, then the resistance of the wire becomes
Options
0 4 times
Half
Double
times​

Answer 1

Answer:

4 times

Explanation:

I HOPE U UNDERSTOOD THE CONCEPT..

Answer 2

Answer:

We know

R= ρ l/ A

, now area becomes half and length is double .

R1 = ρ 2l / A /2

= ρ 4l / A

= 4R

hope it will help you......