An electrically isolated hollow (initially uncharged), conducting sphere has a small positively ...
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0An electrically isolated hollow (initially uncharged), conducting sphere has a small positively charged ball suspended by an insulating rod from its inside surface, (see diagram).
This causes the inner surface of the sphere to become negatively charged. When the ball is centred in the sphere the electric field outside the conducting sphere is
(A) zero
(B) the same as if the sphere wasn't there
(C) twice what it would be if the sphere wasn't there
(D) equal in magnitude but opposite in clireetion to what it would be if the sphere wasn't there
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