Three concentric conducting spherical shells have radii r,2r, and 3r and charges q1,q2 and q3, respectively. Innermost and outermost shells are earthed as shown in figure. The charges shown are after earthing. Select the correct alternative.
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a
q1+q3=−q2
b
q1=−q2
c
q3q2=−13
d
None of these
answer is A.
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Detailed Solution
Potential of outer sphere V=kq13r+kq23r+kq33r=0or q1+q3=−q2