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QUESTION 3
A uniformly charged rigid rod is positioned along the longitudinal axis of a uniformly charged ring, halfway through the ring, as shown in the figure.
2R
The net electric charge of the rod is 4 uC and the net electric charge of the ring is 5 µC. What is the magnitude of the electric force (in uN) exerted by the ring on the
rod if R- 0.2 m and the system is in vacuum.

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