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  4. The capacity of a condenser is 4× 10-6 farad and its potential is 100 volts. The energy released on discharging it fully will be:

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Q. The capacity of a condenser is $ 4\times {{10}^{-6}} $ farad and its potential is 100 volts. The energy released on discharging it fully will be:

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Solution:

The energy released on discharging the capacitor fully, is given by $ E=\frac{1}{2}C{{V}^{2}}=\frac{1}{2}\times 4\times {{10}^{-6}}\times {{(100)}^{2}} $ $ =2\times {{10}^{-2}}=0.02\,J $