Medium
$A$ capacitor of unknown capacity is connected across a battery of $V$ volt. The charge stored in it is $Q$ coulomb. When the potential across the capacitor is reduced by $V_1$ volt,the charge stored in it becomes $Q_1$ coulomb. The potential $V$ is
- A$\frac{Q V_1}{Q-Q_1}$
- B$\frac{Q_1 V_1}{Q+Q_1}$
- C$\frac{Q_1}{Q}$
- D$\frac{Q}{Q_1}$
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