- #1
roflcopter
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Homework Statement
10C of charge are placed on a spherical conducting shell. A -3C point charge is placed at the center of the cavity. The net charge in coulombs on the inner surface of the shell is...
A. -7
B. -3
C. 0
D. +3
E. +7
Homework Equations
[tex]
\oint \vec{E}\cdot d\vec{a} =\frac{Q_{enc}}{\epsilon_0}[/tex]
The Attempt at a Solution
Well, I believe the E field in conducting shell is 0 and inside the cavity the field will also be zero. So, the charges must be on the inner and outer surfaces of the spherical conducting shell. It looks like I should be solving for Q(enclosed) in Gauss's law since that is the net charge but I'm not totally sure about that. I'm stuck now with what to do.
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