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O is mid-point of AB. The magnetic field...

`O` is mid-point of `AB`. The magnetic field at `O` is

A

`(mu_(0)i)/(2pid), ox`

B

`(mu_(0)i)/(pid), o.`

C

`(2mu_(0)i)/(pid), ox`

D

`(4mu_(0)i)/(pid), ox`

Text Solution

Verified by Experts

The correct Answer is:
A

At `O:`
Due to `①`, `B_(1)=(mu_(0)i)/(4pid), ox`
Due to `②`, `B_(2)=(mu_(0)i)/(4pid), ox`
`B_(O)=B_(1)+B_(2)=(mu_(0)i)/(2pid), ox`
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