Electric field inside a solid conducting sphere carrying charge q.

[theBEAST]

Homework Statement

A solid conducting sphere carrying charge q has radius a. What is the electric field when r<a.

Homework Equations

EA=Q_enclosed/ε_o

The Attempt at a Solution

I found it using gauss law where Q=density*V. I ended up with qr/(4pi*a³*ε_o)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.

 

[SammyS]

Homework Statement

A solid conducting sphere carrying charge q has radius a. What is the electric field when r<a.

Homework Equations

EA=Q_enclosed/ε_o

The Attempt at a Solution

I found it using gauss law where Q=density*V. I ended up with qr/(4pi*a³*ε_o)


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.

What do you know about conductors?

What do you know about like charges?

 

[theBEAST]

What do you know about conductors?

What do you know about like charges?

thanks figured it out :)