A solid sphere of radius a is concentric with a hollow sphere of radius b, where b a. If the solid sphere has a charge +Q and the hollow sphere a charge of -Q, the electric field at radius r, where r b, is which of the following, in terms of k = 4π₀)^-¹?

Question

A solid sphere of radius a is concentric with a hollow sphere of radius b, where b > a. If the solid sphere has a charge +Q and the hollow sphere a charge of -Q, the electric field at radius r, where r > b, is which of the following, in terms of k = 4π₀)^-¹?

Quizplus · Accepted Answer

Since the point of interest is outside the larger, negatively charged sphere, there is no net charge contained within the sphere surrounding that point. Therefore, by Gauss's Law, the electric field at this point is zero.

A Solid Sphere of Radius a Is Concentric with a Hollow