Question

Consider a plastic rod that is being charged up by rubbing a wool cloth. It is then brought to an initially neutral metallic sphere, and allowed to touch the sphere for a few seconds. The rod is then separated from the sphere by a small distance. After becoming separated, the rod:________.

A) is repelled by the sphere.B) is attracted to the sphere.C) feels no force due to the sphere.

Answer 1

A) is repelled by the sphere

Step-by-step explanation:

• When a piece of plastic is rubbed with a wooden cloth, it sinks negatively
• Let it change Q. So it is now allowed to touch the neutral zone. Therefore, there is a difference in the surface capacity of the two bodies, so that charge transfer takes place
• Some of its negative charge is transferred to the metal sphere, now both the rod and the sphere are negatively charged and the same chargers as we know are repelled by each other.
• so correct answer is A) is repelled by sphere