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Q. A charge of 2.85 is held fixed at the origin. A second charge of 2.85 is released from rest at the position (1.25, 0.570).

At what distance from the origin does the second charge attain half the speed it will have at infinity?

Q. A small metal ball is given a negative charge, then brought near (i.e., within a few millimetres) 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 behaviour.

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