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Three concentric conducting spherical sh...

Three concentric conducting spherical shells have radii r, 2r, and 3r and charges `q_1,q_2 and q_3`, respectively. Innermost and outermost shells are earthed as shown in figure. The charges shown are after earthing. Select the correct alternative.

A

`q_1+q_3 = -q_2`

B

`q_1 = - q_2`

C

`q_3/q_2 = -1/3`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
A
Potential of outer sphere
`V=(kq_(1))/(3r)+(kq_(2))/(3r)+(kq_(1))/(3r)=0`
or `q_(1)+q_(3)=-q_(2)`
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