The work done in placing a charge of `8xx10^-18` coulomb on a condenser of capacity 100 micro-farad is

Options

A. `16xx10^(32)J`
B. `3.1xx10^(-26)J`
C. `4xx10^(-10)J`
D. `32xx10^(-32)J`

Answer

D

Explanation

`W=(1)/(2)(q^(2))/(C)=(1)/(2)xx((8xx10^(-18))^(2))/(100xx10^(-6))=32xx10^(-32)J`.