A Positive Point Charge Q Is Placed at the Center

question 62

Multiple Choice

A positive point charge q is placed at the center of an uncharged metal sphere insulated from the ground. The outside of the sphere is then grounded as shown. Then the ground wire is removed. A is the inner surface and B is the outer surface. Which statement is correct?

• A)The charge on A is −q; that on B is +q.
• B)The charge on B is −q; that on A is +q.
• C)The charge is on A and on B.
• D)There is no charge on either A or B.
• E)The charge on A is −q; there is no charge on B.

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