The resistance of a wire is `10 Omega`. Its length is increased by `10%` by stretching. The new resistance will now be

Options

A. `12 Omega`
B. `1.2 Omega`
C. `13 Omega`
D. `11 Omega`

Answer

A

Explanation

For stretching:
`R prop l^(2)`
`R_(1)/R_(2) = (l/(11l))^(2) =R_(2) = 1.21 R_(1) = 12.1 Omega`