A positive point charge q is placed at the center of an uncharged metal sphere insulated from the ground. The outside of the sph

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A positive point charge q is placed at the center of an uncharged metal sphere insulated from the ground. The outside of the sph

ere is then grounded. Then the ground wire is removed. A is the inner surface and B is the outer surface.
Which statement is correct?

A. The charge is –q/2 on both A and on B.
B. The charge on A is –q; there is no charge on B.
C. There is no charge on either A or B
D. The charge on A is –q; that on B is +q.
E. The charge on B is –q; that on A is +q.

Physics

1 answer:

Softa [3K] · Answer 1 · 2026-03-22T16:06:53+03:00

B. The charge on A is -q; B has no charge. Given that a positive charge is situated at the center of an uncharged metallic sphere which is insulated and disconnected from the ground, a negative charge (-q) will appear on the inner surface A of the sphere. Should the exterior surface B be grounded, it will become neutral, resulting in no charge remaining on surface B.