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An uncharged metal object M is insulated...

An uncharged metal object `M` is insulated from its surroundings. A positively charged metal sphere `S` is then brought neat to `M`. Which diagram best illustrates the resultant distributions of charge on `S` and `M`

A

B

C

D

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The correct Answer is:
D

Negaticve charge are attracted to surface of `M` near `S` by electrostatic induction and positive charges are repelled to suface of `M` away from `S` such that entire `M` still remain neutral (uncharged)
Charge on `S` is also redstributed to have more charge on surface near to `M` due to the field set up by negative charges on `M`
Diagram `b` thus best illustrates the charge distribution on both `S` and `M`.
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