In the figure, the curved part represent...

In the figure, the curved part represents arc of a circle of radius `x`. If it carries a current `I` then the magnetic field at the point `O` is

`(mu_0Iphi)/(2pix)`

`(mu_0Iphi)/(4pix)`

`(mu_0Iphi)/(2x)`

`(mu_0Iphi)/(4x)`

Text Solution

Verified by Experts

The correct Answer is:

Magnetic field due to straight portions is zero. It is only due to arc of circle.
`:.B=phi/(2pi)((mu_0I)/(2x)) (Radius=x)`
`=(mu_0Iphi)/(4pix)`

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