How does end A of the rod react when the charged ball approaches it after a great many previous contacts with end A? Assume that the phrase "a great many" means that the total charge on the rod dominates any charge movement induced by the near presence of the charged ball.

It is strongly repelled.

It is strongly attracted.

It is weakly attracted.

It is weakly repelled.

It is neither attracted nor repelled.

It is strongly repelled

Explanation:

It is assumed that the conducting rod is not grounded, therefore negative charge is accumulated on both ends of the rod. However, charge cannot remain at ends only therefore, they will distribute themselves throughout the length. Now, when the charged ball approaches it after a great many previous contacts with end A, it will be strongly repelled by the rod. Clearly, both negatively charged as discussed earlier.