10C of charge are placed on a spherical conducting shell. A particle with a charge of - 3C is placed at the center of the cavity. The net charge on the inner surface of the shell is:

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Physics

Johnson

18 February, 19:18

10C of charge are placed on a spherical conducting shell. A particle with a charge of - 3C is placed at the center of the cavity. The net charge on the inner surface of the shell is:

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Cody Strong · Answer 1

+ 3C.

Explanation:

Applying Gauss's Law to a closed surface encircling the inner surface of the shell, passing through the shell, as the electrostatic field is zero inside a conductor (otherwise there should be moving charges inside the conductor), the net charge enclosed by the surface, must be zero.

So, if we have a - 3C charge at the center of the cavity, there must be a + 3C charge distributed on the inner surface of the shell, so net charge be zero.