A Positive Point Charge Q Is Placed at the Centre

question 14

Multiple Choice

A positive point charge q is placed at the centre 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.

---

Definitions:

Marginal Product

The additional output gained by employing one more unit of input, such as labor or capital.

Marginal Product

The extra output that is produced by using one more unit of a factor, such as labor or capital, while keeping other factors constant.

Ceteris Paribus

A Latin phrase meaning "all other things being equal," used in economics to isolate the effect of one variable.

Production

The process of combining various material inputs and immaterial inputs (plans, know-how) to make something for consumption.