# A conducting sphere is placed within a conducting spherical shell. The conductors are in electrostatic equilibrium.

A conducting sphere is placed within a conducting spherical shell. The conductors are in electrostatic equilibrium. The inner sphere has a radius of 1.5cm, the inner radius of the spherical shell is 2.25cm, and the outer radius of the shell is 2.75cm. If the inner sphere has a charge of 250nC, and the spherical shell has zero net charge,