A condenser having a capacity $2.0$ micro farad is charged to $200\;volts$ and then the plates of the capacitor are connected to a resistance wire. The heat produced in joules will be
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(c) $U = \frac{1}{2}C{V^2} = \frac{1}{2} \times 2 \times {10^{ - 6}} \times {(200)^2} = 4 \times {10^{ - 2}}\,J$
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