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There are two concentric spherical shell...

There are two concentric spherical shell of radii r and `2r`. Initially, a charge Q is given to the inner shell and both the switches are open.

Now, `S_2` is closed and opened. The charge flowing through the swithc `S_2` in the process is

A

Q

B

`Q//4`

C

`Q//2`

D

`2Q//3`

Text Solution

Verified by Experts

The correct Answer is:
C
`V_("inner")=0`
`:. (kQ_2)/r+(kQ_1)/(2r)=0`
`:. Q_2=-Q_1/2=Q/2` = charge on iner shell
Charge flown through `S_2`= initial charge on inner shell final charge on it
`=Q-Q_2=Q/2`
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