Self Assessment Quiz

1. Calculate the capacitance of two conductors carrying equal and opposite charges in terms of the coefficient of potential.

2.Three concentric shells of radii  respectively carry charges  and . Calculate the energy of the system.

3. Two concentric spherical shells of radii  are both grounded and a point charge q is placed at a distance r between them, being insulated from both the surfaces. Calculate the energy of the system charges.

4. Calculate the work done in doubling the separation  between the plates of a parallel plate capacitor  from d to 2d, if the potential difference between the plates remains