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posted by  chevy123 on 9/15/2008 9:58:46 AM  |  status: Live  

Physics

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General Physics N/A N/A N/A
Question Details:
An isolated conductor of arbitrary shape has a net charge of +10x10-6C . Inside the conductor is a cavity within which is a point charge q=+3.0x10-6C. What is the a. charge on the cavity wall and b. the charge on the outer surface of the conductor?
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posted by booboo123 on 9/15/2008 10:03:59 AM  |  status: Live
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chevy123's comment:
"thanks"
Response Details:
(a) Electric field inside a conductor equals zero. So, if we have Gaussian surface surrounding the cavity region within the conductor, the total charge enclosed must be zero.
So the charge on the cavity wall = - 10.00×10-6 C.

(b) The charge on the outer surface = 10.00×10-6 C + 3.00×10-6 C
                                                       = 1.3 x 10-5 C

* if your net charge was a typo and supposed to be +1.0 x 10-6,  just sub that in anywhere you see 10.00x10-6  :)
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