Find potential of a ball inside a grounded shell

  • Thread starter tigigi
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  • #1
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I have this question that initially a metal ball of radius r1 with potential v1, then surrounded by a conducting shell with radius r2. Find potential of ball if shell grounded.

So v1 =kq/r1, then q=vr1/k, can I say directly that shell will have -q since it's induced by ball?
Then v ball will be kq /r1 + k(-q)/r2 ?
I'm not sure if I find should count the potential due to shell when I find the v ball?
Thanks for help.
 

Answers and Replies

  • #2
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Looks correct.
I'm not sure if I find should count the potential due to shell when I find the v ball?
You'll need that, or the condition that the shell has a potential of zero. Both approaches are possible and looks very similar.
 

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