A wire of resistance `R` is elongated `n-fold` to make a new uniform wire. The resistance of new wire.

Options

A. nR
B. `n^(2) R`
C. 2nR
D. `2n^(2)R`

Answer

B

Explanation

For stretching wire
`therefore R prop l^(2)`
`therefore E^(.)/R = (n^(2)l^(2))/l^(2)`
`R. = n^(2)R`