A solid conducting sphere carrying charge q has radius a. What is the electric field when r<a.
The Attempt at a Solution
I found it using gauss law where Q=density*V. I ended up with qr/(4pi*a3*εo)
HOWEVER, my friend told me it should be E=0 and we are unsure which one is the right answer. The method I used assumes that the charge is uniformly distributed throughout the volume of the sphere.
Also, I believe that E=0 only when you have a hollow sphere with no charge inside. In this question, it is a SOLID sphere.