APFIVE Charge on a Grounded Concentric Sphere
An insulated conducting sphere of radius r carries charge +Q and is connected to the ground by a wire. It is surrounded by a concentric conducting shell of radius 2r that carries charge -Q. After connecting the inner sphere to ground, what is the final net charge on the inner sphere?
A
Inner sphere acquires charge -Q/2
B
Inner sphere acquires charge Q/2
C
Inner sphere acquires charge -Q
D
Inner sphere retains charge +Q
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