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The plates of a parallel plate capacitor have an area of $90 \;cm^{2}$ each and are separated by $2.5\; mm$. The capacitor is charged by connecting it to a $400\; V$ supply.How much electrostatic energy is stored by the capacitor?

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$2.55 \times 10^{-6}\;J$
Hence A is the correct answer.
answered Jun 23, 2014 by meena.p
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