Question

A solid metal sphere of radius a = 2.5 cm has a net charge Q_in = - 3 nC (1 nC = 10-9C). The sphere is surrounded by a concentric conducting spherical shell of inner radius b = 6 cm and outer radius c = 9 cm. The shell has a net charge Q_out = + 2 nC. What is V0, the electric potential at the center of the metal sphere, given the potential at infinity is zero?

Answer 1