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Electric field inside a solid conducting sphere carrying charge q.

  • Thread starter theBEAST
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1. Homework Statement
A solid conducting sphere carrying charge q has radius a. What is the electric field when r<a.


2. Homework Equations
EA=Qenclosedo

3. The Attempt at a Solution
I found it using gauss law where Q=density*V. I ended up with qr/(4pi*a3o)


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.
 
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Answers and Replies

  • #2
SammyS
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1. Homework Statement
A solid conducting sphere carrying charge q has radius a. What is the electric field when r<a.


2. Homework Equations
EA=Qenclosedo

3. The Attempt at a Solution
I found it using gauss law where Q=density*V. I ended up with qr/(4pi*a3o)


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?
 
  • #3
366
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What do you know about conductors?

What do you know about like charges?
thanks figured it out :)
 

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