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Consider two concentric metal spheres. T...

Consider two concentric metal spheres. The outer sphere is given a charge `Qgt0`, then
,

A

the electrons will flow from earth to inner sphere if S is shorted

B

the electrons will flow from inner sphere to the earth if S is shorted

C

the shorting of S will produce a charge of `-Q` on the inner sphere

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
a. When `S` is open, spheres `A` and `B` have same, positive potential when `S` is closed, potential of `B` will become zero, so the potential of `B` will decrease. This decrease of potential takes place due to flow of electrons from earth to inner sphre `B`. But magnitude of charge acuired by inner sphere will be less than `Q`.
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