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A conducting spherical shell is earthed. A +ve charge +q1 is placed at its centre and another +ve charge +q2 is placed outside at a distance d from centre . If the conducting spherical shell is not earthed , then force on q2 is:

(A)zero(B)q1q24π0d2(C)q1q24π0(dR)2(D)q1q24π0(d2R2)

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