A conductor `A` is given a charge of amount `+Q` and then placed inside a deep metal can `B`, without touching it

Options

A. The potential of `A` does not change when it is placed inside `B`.
B. If `B` is earthed `+Q`, amount of charge flows from it inot the earth.
C. If `B` is earthed, the potential of `A` is reduced.
D. Eigther (b) or (c) are true, or both are true only if the outer surface of `B` is connected to the earth andnot its inner surface.

Answer

A, B, C