A capacitor 'C' is charged to a potential V by a battery. The e.m.f of the battery is V. It is then disconnected from the battery
and again connected with its polarity reversed to the battery. Then
(a)The work done by the battery is CV²
(b) The total charge that passes through battery is 2 CV
(c) The initial and final energy of the capacitor is same
(d) The work done by the battery is, 2CV²

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only b, c, d are true

only a, b, d are true

only a, d, b are true

only a, c, d are true

answer is D.

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Detailed Solution

a) The work done by battery is $2 {CV}^{2}$

b, c and d are correct.

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