Question

A long conducting rodsuspended by insulating strings. Assume that the rod is initiallyelectrically neutral. For convenience we will refer to the left endof the rod as end A, and the right end of the rod as end B. In theanswer options for this problem, "strongly attracted/repelled"means "attracted/repelled with a force of magnitude similar to thatwhich would exist between two charged balls.

1. A small metal ball is given a negative charge, then brought near (i.e., within about 1/10 the length of the rod) to end A of the rod. What happens to end A of the rod when the ball approaches it closely this first time?
O It is strongly repelled.
O It is stronglyattracted.
O It is weakly attracted.
O It is weakly repelled.
O It isneither attracted nor repelled.

Answer 1

It is strongly attracted.

Step-by-step explanation:

The rod is a conducting, it means that the charges are moving freely. So, when the ball is brought near it, the charges will move in response to the negative charge of the ball, to repulse to it, then they move from end B. It means that end A will be positively charged, the opposite of the ball, so they will be strongly attracted.