Question

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 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

• A. Zero
• B. $\frac{25C{V}^2}{6}$
• C. $\frac{3C{V}^2}{2}$
• D. $\frac{9C{V}^2}{2}$

Answer 1

The correct option is C $\frac{3C{V}^2}{2}$