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  4. A capacitor of capacitance 10 μ F is charged to 10 V. The energy stored in it is

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Q. A capacitor of capacitance $10 \, \mu F$ is charged to $10 V$. The energy stored in it is

KCETKCET 2012Electrostatic Potential and Capacitance

Solution:

Energy stored in capacitor,
$U = \frac{1}{2}CV^{2} = \frac{1}{2}\times10\times10^{-6}\times\left(10\right)^{2}$
$= 500\times10^{-6} \,J$
Energy stored in a capacitor $U = 500\, \mu J$