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An electric current I enters and leaves ...

An electric current I enters and leaves a uniform circular wire of radius a through diametrically opposite points. A charged paricle q moving along the axis of the circular wire passes through its centre at speed v. The magnetic force acting on the particle when it passes through the centre has a magnitude

A

`(qv mu_(0)i)/(2a)`

B

`(qv mu_(0)i)/(2pi a)`

C

`(qv mu_(0)i)/(2a)`

D

zero

Text Solution

Verified by Experts

The correct Answer is:
D

Magnetic field at `O, B = 0`
Force on charged particle `= 0`
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