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A ring of radius R carries a uniformly d...

A ring of radius R carries a uniformly distributed charge +Q. A point charge `-q` is placed on the axis of the ring at a distance 2R from the centre of the ring and released from rest. The particle executes a simple harmonic motion along the axis of the ring. State True or False.

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The correct Answer is:
F
Motion is simple harmonic only when charge –q is not very far from the centre of ring on its axis. Otherwise motion is periodic but not simple harmonic in nature.
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