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Question : A thin metallic spherical shell of radius R carries a charge Q on its surface. A point charge Q/2 is placed at its centre C and another charge +2Q is placed at a distance x from the center. Find the force on the charge Q/2 and 2Q. 

Doubt by Safir

Detailed Solution : Coming Soon

Ans : Force on charge Q/2 = 0 
Force on charge 2Q = 3kQ2/r2