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A conducting sphere of radius R and a concentric thick spherical shell of inner radius 2R and outer radius 3R is shown in figure. A charge +10Q is given to the shell and inner sphere is earthed. Then charge on inner sphere is A. -4Q B. -10Q C. 0 D. None Plz solve it

A conducting sphere of radius R and a concentric thick spherical shell of
inner radius 2R and outer radius 3R is shown in figure. A charge +10Q is
given to the shell and inner sphere is earthed. Then charge on inner sphere is
 
A. -4Q
B. -10Q
C. 0
D. None
 
Plz solve it

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Grade:11

1 Answers

Vikas TU
14149 Points
3 years ago
Hiii Mantra 
Take gausian surface in the region of grunded sphere and the shell .
Take close integral of E.ds = q/epselon
E=0 
so q will come exactly opposite to 10Q
so ans would be -10Q.
Hope this helps.

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