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Two thin conducting shells of radii R an...

Two thin conducting shells of radii `R` and `3R` are as shown in the fig. External shell carries a charge `+Q` and inner shell neutral. The inner shell is earthed with the help of a switch `S`. Then

A

with the switch `S` open the potential of the inner sphere is equal to that of the outer

B

when the switch `S` is closed,the potential of the inner sphere become zero

C

With the switch `S` is closed the charge attained by the inner sphere is `-q//3`

D

By closing the switch the capacitance of the system increase.

Text Solution

Verified by Experts

The correct Answer is:
A,B,C,D
Use capacitence of a spherical conductor.
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