1.

The work done in placing a charge of `8xx10^-18` coulomb on a condenser of capacity 100 micro-farad isA. (a) `16xx10^-32` jouleB. (b) `3.1xx10^-26` jouleC. (c) `4xx10^-10` jouleD. (d) `32xx10^-32` joule

Answer» Correct Answer - D
The work done is stored as the potential energy. The potential energy stored in a capacitor is given by
`U=1/2(Q^2)/(C)=1/2xx((8xx10^-18)^2)/(100xx10^-6)=32xx10^-32J`


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