We take as an example a long conducting rod suspended by insulating strings. Assume that the rod is initially electrically neutral. For convenience we will refer to the left end of the rod as end A, and the right end of the rod as end B. 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. 1. What happens to end A of the rod when the ball approaches it closely this first time? a. strongly repelledb. strongly attractedc. weakly attractedd. weakly repellede. neither attracted nor repelled
2. Now consider what happens when the small metal ball is repeatedly given a negative charge and then brought into contact with end A of the rod. After a great many contacts with the charged ball, how is any charge on the rod arranged (when the charged ballis far away)?
a. positive charge on end B and negative charge on end Ab. negative charge spread evenly on bothc. negative charge on end A with end B remaining neutrald. both ends neutrale. positive charge spread evenly on both
3. How does end A of the rod react when the recharged ball approaches it after a great many previous contacts with end A?
a. strongly repelledb. strongly attractedc. weakly attractedd. weakly repellede. neither attracted nor repelled4. How does end B of the rod react when the charged ball approaches it after a great many previous contacts with end A?a. strongly repelledb. strongly attractedc. weakly attractedd. weakly repellede. neither attracted nor repelled