An Uncharged Metal Plate (P)is Connected by a Conductor to Ground

An uncharged metal plate (P) is connected by a conductor to ground through a switch (S) .The switch (S) is initially closed.A negative charge -Q is brought close to P without touching it and then the switch (S) is opened.After the switch (S) is open,the negative charge -Q is removed.After the negative charge -Q is removed,what is the charge on the plate (P) ?

A) It is now positively charged.
B) It is now negatively charged.
C) It is still uncharged.
D) It cannot be determined without knowing how much charge was on the metal plate P before switch S was closed.

Correct Answer:

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