Question

A capacitor of capacitance C is charged to a potential difference V from a cell and then disconnected from it. A charge +Q is now given to its positive plate. The potential difference across the capacitor is now?

Answer 1

Please find the answer below:

Keeping in view that; a capacitor of capacitance C is charged to a potential difference V from a cell and then disconnected from it. A charge +Q is now given to its positive plate.

The potential difference across the capacitor is now V+2C/Q