An insulating sphere of radius R = 0.10 m has a uniform surface charge density e

Question

An insulating sphere of radius R = 0.10 m has a uniform surface charge density equal to 5.9 mC/m2. A point charge of magnitude 0.71 mC is 0.45 m from the center of the sphere. The magnitude of the force exerted by the sphere on the point charge is 0.024 N.

PART A
Suppose the charged sphere is made from a conductor, rather than an insulator. Do you expect the magnitude of the force between the point charge and the conducting sphere to be greater than, less than, or equal to the force between the point charge and an insulating sphere?
Equal to
Greater than
Less than

PART B
Choose the best explanation from among the following:

The charge of the sphere is the same whether it is conducting or insulating, and therefore the force is the same. The charge on a conducting sphere will move as far away as possible from the point charge. This results in a reduced force. The conducting sphere will allow the charges to move, resulting in a greater force.

Explanation / Answer

A) Equal to

B)1. The charge of the sphere is the same whether it is conducting or insulating, and therefore the
force is the same.

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