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  4. What fraction of the energy drawn from the charging battery is stored in a capacitor ?

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Q. What fraction of the energy drawn from the charging battery is stored in a capacitor ?

KCETKCET 2002Electrostatic Potential and Capacitance

Solution:

Work done = QV = (CV) V = CV$^2$
Energy stored = $\frac{1}{2} CV^2$ $i.e.$ 50%