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# A 12 p F capacitor is connected to a 50 V battery. How much electrostatic energy is stored in the capacitor?

2.10 A 12pF capacitor is connected to a 50V battery. How much electrostatic energy is stored in the capacitor?

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As we know,

the electrostatic energy stored in the capacitor is

$E=\frac{1}{2}CV^2$

Here,

$C= 12pF$

$V=50V$

So,

$E=\frac{1}{2}CV^2=\frac{1}{2}12*10^{-12}*50^2=1.5*10^{-8}J$

Hence energy stored in the capacitor is $1.5*10^{-8}J$

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