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The energy required to charge a parallel...

The energy required to charge a parallel plate condenser of plate separtion `d` and plate area of cross-section `A` such that the unifom field between the plates is `E` is

A

` epsi _ 0 E^ 2 Ad `

B

` ( 1 ) /( 2 ) epsi _ 0 E ^ 2 Ad `

C

` ( 1 )/ ( 2 ) epsi _ 0 E ^ 2 //Ad `

D

` ( epsi _ 0 E ^ 2 ) /( Ad ) `

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The correct Answer is:
A
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