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  4. A capacitor when charged by a potential difference of 200 volt, stores a charge of 0.1 C. By discharging, energy liberated by the capacitor is :

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Q. A capacitor when charged by a potential difference of 200 volt, stores a charge of 0.1 C. By discharging, energy liberated by the capacitor is :

MGIMS WardhaMGIMS Wardha 2003

Solution:

Given: $ V=200 $ volt, $ Q=0.1 $ coulomb Energy liberated $ U=\frac{1}{2}QV $ $ =\frac{1}{2}\times 0.1\times 200 $ $ =10J $