Question

given piece of wire length L cross section area a and resistance R is stretched uniformly to a wire of length 2L what will be the new resistance​

Answer 1

Answer:

it will be twice the earlier

Explanation:

R=rho*l/a

Answer 2

Explanation:

this question basically requires an understanding of volume.

we know volume = (length) x (area of cross section )

(So obviously length increases to twice then obviously area of cross section decreases to half )