# Homework Help: Electric Potential inside and outside a spherical Shell

1. Sep 27, 2010

### physwil90

1. Find the electric potential inside and outside a uniformly charged sphere of radius R, and whose total charge is q. Use infinity as your reference point. Compute the gradient of V in each region and check that it yields the correct field. Sketch V(r).

2. I used the theorem that electric potential equals the negative integral of the electric field dotted with dl.

3. They way I tried to solve this was that I said the electric field inside the sphere is zero and the electric field outside the sphere was from Gauss's law

2. Sep 27, 2010

### ehild

Apply Gauss' law also in the inside of the sphere. It is uniformly charged. There is charge enclosed within any Gaussian surface inside the sphere.

ehild

3. Sep 27, 2010

### fizzynoob

The electric field is only zero inside of a conductor, your problem states that the object is uniformally charge which hints that it is a insulator.