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Q.

A capacitor is charged with a battery and energy stored is U. After disconnecting battery another capacitor  of same capacity is connected in parallel with it. Then energy stored in each capacitor is :

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a

2U

b

4U

c

U/2

d

U/4

answer is B.

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Detailed Solution

Energy= Q22C Charge gets distributed equally, hence energy= U4

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A capacitor is charged with a battery and energy stored is U. After disconnecting battery another capacitor  of same capacity is connected in parallel with it. Then energy stored in each capacitor is :