Home
Class 12
PHYSICS
Figure shows two conducting thin concent...

Figure shows two conducting thin concentric shells of radi `r` and `3r`. The outer shell carries a charge q. Inner shell in neutral. Find the charge that wilL flow from inner shell to earth the switch S is closed.

A

`q/3`

B

`-q/3`

C

`q`

D

`-q`

Text Solution

Verified by Experts

The correct Answer is:
A
Let q' be the charge on inner shell when it is earthed.
Potential of inner shell is zero.
`:. 1/(4piepsilon_0)[q'/r+q/(3r)]=0`
`:. q'=-q/3`
i.e. `+q/3` charge will flow from inner shell to earth.
Promotional Banner

Topper's Solved these Questions

  • ELECTROSTATICS

    DC PANDEY|Exercise Example Type 8|3 Videos

  • ELECTROSTATICS

    DC PANDEY|Exercise Level 2 Single Correct|94 Videos

  • ELECTROSTATICS

    DC PANDEY|Exercise Example Type 5|5 Videos

  • ELECTROSTATIC POTENTIAL AND CAPACITORS

    DC PANDEY|Exercise (C) Chapter exercises|50 Videos

  • GRAVITATION

    DC PANDEY|Exercise All Questions|120 Videos