A conducting sphere A of radius ‘a’ with charge Q, is placed concentrically inside a conducting shell B of radius ‘b’. The sphere B is earthed. ‘C’ is the common center of A and B. Study the following statements.i. The potential at a distance r from C, where r
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a
Only (i) and (ii)
b
Only (ii) and (iii)
c
Only (i) and (iii)
d
All
answer is B.
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Detailed Solution
Charge +Q will flow into earth.∴B will have −Q For a≤r≤bVr=kQr−kQb For r