1.

A 4 muF capacitor is charged to 400 V and then its plates are joined through a resistance of 1 K Omega. The heat produced in the resistance is

Answer»

0.16 J
0.32 J
0.64 J
1.28 J

Solution :The energy stored in capacitor is converted into heat
` U = H = (1)/(2) CV^(2) = (1)/(2) xx 4 xx 10^(6) xx (400)^(2) = 0.32 J `


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