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Electric Current

On changing a...

Question

On changing a capacitor with charge Q stored energy is W. If charge is doubled then stored energy will be:-

2 W

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4 W

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8 W

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\frac{1}{2} W

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Solution

The correct option is B $4 W$
$\begin{matrix} w = \frac{Q}{2 C} w^{^{'}} = \frac{4 Q}{2 C} = 4 w H e n c e, o p t i o n B i s c o r r e c t a n s w e r . \end{matrix}$

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Similar questions

A capacitor of capacitance $C$ has charge $Q$ and stored energy $W$ . If the charge is increased to $2 Q$ , the stored energy would be:

C

Q

W

2 Q

L C

U

Q

Q / 2

10 μ F

^{'} C^{'}

^{'} Q^{'}

^{'} K^{'}

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