A wire is stretched to n times its length. Then the resistance now will be increase by

Options

A. n times
B. 1/n times
C. `n^(2)` times
D. `1// n^(2)` times

Answer

C

Explanation

Al=constant
`rArr l'=nl`
`rArr A'=A/n`
`R'=(rhol^(1))/(A')=x^(2)(rhol)/A`