This problem explores the behavior of charge on conductors. We take as an exampl
ID: 1312606 • Letter: T
Question
This problem explores the behavior of charge on conductors. 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. In the answer options for this problem, "strongly attracted/repelled" means "attracted/repelled with a force of magnitude similar to that which would exist between two charged balls.
Part A
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ANSWER:
It is neither attracted nor repelled.
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.
Part B
After a great many contacts with the charged ball, how is the charge on the rod arranged (when the charged ball is far away)?
ANSWER:
After a great many contacts with the charged ball, how is the charge on the rod arranged (when the charged ball is far away)?
Part C
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.
ANSWER:
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 neither attracted nor repelled.
Part D
How does end B of the rod react when the charged ball approaches it after a great many previous contacts with end A?
You did not open hints for this part.
ANSWER:
How does end B of the rod react when the charged ball approaches it after a great many previous contacts with end A?
It is strongly repelled. It is strongly attracted. It is weakly attracted. It is weakly repelled.It is neither attracted nor repelled.
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.
Part B
After a great many contacts with the charged ball, how is the charge on the rod arranged (when the charged ball is far away)?
ANSWER:
After a great many contacts with the charged ball, how is the charge on the rod arranged (when the charged ball is far away)?
There is positive charge on end B and negative charge on end A. There is negative charge spread evenly on both ends. There is negative charge on end A with end B remaining neutral. There is positive charge on end A with end B remaining neutral.Part C
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.
ANSWER:
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.
Part D
How does end B of the rod react when the charged ball approaches it after a great many previous contacts with end A?
You did not open hints for this part.
ANSWER:
How does end B of the rod react when the charged ball approaches it after a great many previous contacts with end A?
It is strongly repelled. It is strongly attracted. It is weakly attracted. It is weakly repelled. It is neither attracted nor repelled.Explanation / Answer
Part A) It is strongly attracted
Part B) There is negative charge spread evenly on both ends.
Part C) It is strongly repelled.
Part D) It is strongly repelled.
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