Medium
$A$ parallel plate capacitor of capacitance $C$ is connected to a battery and is charged to a potential difference $V$. Another capacitor of capacitance $2C$ is connected to another battery and is charged to a potential difference $2V$. The charging batteries are now disconnected and the capacitors are connected in parallel to each other in such a way that the positive terminal of one is connected to the negative terminal of the other. The final energy of the configuration is
- AZero
- B$\frac{25CV^2}{6}$
- C$\frac{3CV^2}{2}$
- D$\frac{9CV^2}{2}$
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$(D)$ The potential at all points on the line $ST$ is same.
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