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The capacity of a condenser is 4×106  farad and its potential is 100 volts . The energy released on discharging it fully will be

a
0.02  joule
b
0.04  joule
c
0.025  jolue
d
0.05 joule

detailed solution

Correct option is A

U=12CV2=12×4×10−6×1002=0.02J

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