An ideal parallel-plate capacitor consists of a set of 2 parallel plates of area

Question

An ideal parallel-plate capacitor consists of a set of 2 parallel plates of area A separated by a very small distance d. When the capacitor plates carry charges +Q and -Q, the capacitor stores energy U0. If the separation between the plates is doubled, how much electrical energy is stored in the capacitor? A/ U0/4 B/ U0/2 C/2U0 D/U0 E/4U0 I need help ASAP. Thanks. An ideal parallel-plate capacitor consists of a set of 2 parallel plates of area A separated by a very small distance d. When the capacitor plates carry charges +Q and -Q, the capacitor stores energy U0. If the separation between the plates is doubled, how much electrical energy is stored in the capacitor? A/ U0/4 B/ U0/2 C/2U0 D/U0 E/4U0 I need help ASAP. Thanks. A/ U0/4 B/ U0/2 C/2U0 D/U0 E/4U0 I need help ASAP. Thanks.

Explanation / Answer

Energy stored between plates given by. = Q2/2C

Capacitance C depends on distance between plates And indirectly proportional to distance so energy stored is directly proportional to distance between plates

Therefore energy stored is double when we double distance

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