I negatively charge a plastic ruler by rubbing it with a piece of material. I have a metal ball hanging from a piece of shing line (which is an insulator, so charge cannot travel along the shing line). I move the charged ruler near to the metal ball, without touching it. so that a charge is induced on the metal ball. Which of the following correctly describes the net (total) charge on the metal ball? Select one: 0 a. Unchanged, because no charge actually ows from the ruler or through the string so all that happens in inducing charge is the separation of charges (moving electrons to far side leaving excess positive charge on the near side. 0 b. Negative, but less in magnitude than the charge of the ruier, because only some electrons move from the ruler to the ball to balance charges. 0 c. Positive, but less in magnitude than the charge of the ruler, because only some electrons move from the ball to the ruler to balance charges. 0 d. Positive and equal in magnitude to the charge of the ruler, because electrons move from the ball to the ruler to offset the negative charge of the ruler. 0 e. Negative and equal in magnitude to the charge of the ruler, because electrons from the ruler move to the ball to offset the charge. 0 f. Unchanged, because any electrons transferred from the ruler to the ball can ow to the Earth across the string holding the ball. I have two metal balls, A and B, each suspended from a length of shing line. Both balls have been negatively charged, but ball B has twice the total charge of ball A. When the balls are brought near each other they can be seen to repel each other. How does the force exerted on ball A by ball B compare to that exerted by ball B on ball A? Select one: Q a. 1/2 as large: Ball B acting on ball A acts on only half as much charge so this force is half as much. 0 b. D the force of two negatively charged obiects cancels. O c. The same: the force depends on both charges. 0 d. 2x as large: Ball b has twice the charge so exerts twice the force. I have two metal balls, A and B, each suspended from a length of shing line. Both balls have been negatively charged, but bail B has twice the total charge of ball A. When the balls are made to touch. What happens to the charges? Select one: 0 a. They become equal. the electrons from the more negative ball move over till both have the same charge. 0 b. They remain unchanged, like charges repel so the electrons avoid each other and therefore don't move around. 0 c. They swap so that ball A has twice as much, because the electrons ow from B to A and then will oscillate back and forth until the balls are split apart