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Eight charges each of value q are placed...

Eight charges each of value q are placed on a ring of radius R placed in x - y plane with origin at centre . A - q charge having mass m is projected from `z=oo` towards the centre of the ring with velocity v . The velocity of - q when it reaches the centre of ring is (neglect gravity)

A

`sqrt((8kq^2)/(mR))`

B

`sqrt((8kq^2)/(mR)+v)`

C

`sqrt((16kq^2)/(mR)+v^2)`

D

`sqrt((16kq^2)/(mR)+v)`

Text Solution

Verified by Experts

The correct Answer is:
C
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