# A charged solid spherical conductor with a charged solid spherical shell

A solid spherical conductor has charge + Q and radius R. It is surrounded by a solid spherical shell with charge − Q, inner radius 2R, and outer radius 3R. The objects are isolated in space and the electric potential is zero as the distance from the spheres approaches infinity. Point A is at the center of the inner sphere, Point B is located at R, Point C is located at 2R and point D is located at 3R. All distances are from the center of the inner sphere.
Where is the electric potential maximum?
Where is the electric field maximum?

# How much heat is released ?

A spherical conductor has a capacitance of 8 µF and it is charged to a potential of 2000V. The conductor is connected with a long thin wire to an another uncharged spherical conductor of capacity of 32 µF.
Determine how much heat is released.

# A spherical drop of water carrying a charge.

A spherical drop of water carrying a charge of 0.032 nC has a potential of 512 V at its surface.

a) What is the radius of the drop?
b) If two such drops with the same radius and charge were to combine to form a single drop, what would be the potential at the surface of the new drop?