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A variable capacitor is connect to a 200...

A variable capacitor is connect to a 200 V battery . If its capacitance is changed from `2 mu F` to X. `muF` , the decrease in energy of the capacitor is ` 2 xx 10^(-2)J` . The value of X is -

A

`1 mu F `

B

` 2 mu F `

C

`3 mu F `

D

` 4 mu F `

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