A large, metallic, spherical shell has no net charge. It is supported on an insulating stand and has a small hole at the top. A small tack with charge Q is lowered on a silk thread through the hole into the interior of the shell. What is the charge on the inner surface of the shell now?
1.Q
2.Q/2
3.0
4.-Q/2
5.-Q
3
Physics & Space Science
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