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A parallel plate capacitor of 100 pF having an air dielectric...

This question belongs to Electronics And Communications Engineering Electromagnetic Field Theory
Electromagnetic Field Theory
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A parallel plate capacitor of 100 pF having an air dielectric is charged to 10 kV. It is then electrically isolated. The plates are pulled away from each other until the distance is ten times more than before. Estimate the energy needed to pull the plates.

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Correct Answer: Option A
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