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Calculate the amount of energy released on discharging a capacitor which has a potential difference of 200 V across its plates and 0.1 C charge is stored in it.

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5 J

10 J

2.5 J

20 J

answer is B.

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Detailed Solution

Here, V = 200, q = 0.1 C.

Energy stored,

$U = \frac{1}{2} qV = \frac{1}{2} \times 0 .1 \times 200 = 10 J$

When the capacitor is discharged, it releases the same amount of energy i.e., 10 J.

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