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Q.

A spherical conductor A of radius r is placed concentrically inside a conducting shell B of radius  R(R>r). A charge Q is given to A, and then A is joined to B by a metal wire. The charge flowing from A to B will be

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a

Q(RR+r)

b

Q

c

Q(rR+r)

d

Zero

answer is C.

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Detailed Solution

When two concentric shells are connected, for any charge on outside shell, it will be at lower potential  all charge flows on to it from inner shell

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