Question

if the length of the wire of same material and same thickness is doubled then how its resistance will change​

Answer 1

Answer:

Increase 4 times the initial value

Explanation:

Answer 2

Length of wire is directly proportional to resistance and area of cross section is inversely proportional to resistance.

Let R be the resistance of wire.

Therefore new resistance

R=2l/2A =l/A therefore resistance remains unchanged.