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A positive charge Q is uniformly distrib...

A positive charge Q is uniformly distributed along a circular ring of radius R. A small test charge q is placed at the centre of the ring as shown in fig. Then

A

If `qgt0` and is displaced away from the centre in the plane of the ring, it will be pushed back towards the centre

B

If `qlt0` and is displaced away from the centre in the plane of the ring, it will never return to the centre and will continue moving till it hits ring

C

If `qlt0`, it will perform SHM for small amplitude

D

q at the centre of the ring is in an unstable equilibrium within the plane of the ring for `qgt0`

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The correct Answer is:
A, B, C
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