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## Homework Statement

Suppose a conducting spherical shell carries a charge of 3.00 nC and that a charge of -2 nC is at the center of the sphere. If the distance from the center to the inner shell is 2.00 m, and the distance from the center to the outer shell is 2.40 m, find the electric field at:

a.) r = 1.5 m from center

**b.) r = 2.2 m from center**

c.) r = 2.5 m from center

**d.) What is the charge distribution on the sphere?**

## Homework Equations

Using Gauss's law and the principle of electric flux, I was able to correctly derive the equation:

(E)(r^2) = (Qinside)(ke)

E=electric field

ke = 9 x 10^9

## The Attempt at a Solution

I was able to get parts (a) and (c) just be using the equation and plugging in the charges that I knew.

The answer for (b) = 0

the answer for (d) = 2.00 nC on the inner surface, 1.00 nC on the outer surface.

I have worked for like 2 days on this problem and couldn't figure it out. Please help! Thanks in advance.