A small metal ball is given a negative charge, then brought near (i.e., within a

Question

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? Select the expected behavior. strongly repelled strongly attracted weakly attracted weakly repelled 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 After a great many contacts with the charged ball, how is any charge on the rod arranged (when the charged ball is far away)? Select the best description. positive charge on end B and negative charge on end A negative charge spread evenly on both negative charge on end A with end B remaining neutral both ends neutral positive charge spread evenly on both How does end A of the rod react when the (re)charged ball approaches it after a g-eat many previous contacts with end A? Select the expected behavior. strongly repelled strongly attracted weakly attracted weakly repelled neither attracted nor repelled How does end B of the rod react when the charged ball approaches it after a great many previous contacts with end A? Select the expected behavior. strongly repelled strongly attracted weakly attracted weakly repelled neither attracted nor repelled

Explanation / Answer

Part A : The end A of the rod will get strongly attracted towards the ball as in the grounded condition there will be exact amount of charge induced but with opposite sign at the end A.

Part B : Since the rod is finite, the negative charge given to the end A will go to the ground. Hence both end will be nuetral.

Part C : End A will get strongly attracted as there will be exact opposite charge induced at the end A again.

Part D : End B wil get strongly repelled by the ball as there will be exact amount of negative charge induced at the end B

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