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Energy of a Capacitor

Two conductor...

Question

Two conductors are placed at large distance, they are connected by wire & switch, find loss in energy of system (after switch is closed)

A

20 n J

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B

zero

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C

10 n J

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D

7 n J

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Solution

The correct option is B zero
We know, $V = \frac{Q}{C}$
Calculating we get $V_{1} = 5 V$ and $V_{2} = 5 V$
Both conductors are at some potential, no transfer of charge, system was at minimum energy, hence no loss of energy will take place.

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