A wire is bent in the form of a circular...

A wire is bent in the form of a circular arc of radius r with a straight portion AB. If the current in the wire is `i`, then the magnetic induction at point O is

`(mu_(0)i)/(2pir) tan phi`

`(mu_(0)i)/(2pi r) (pi - phi)`

`(mu_(0)i)/(2pi r) (pi - phi + tan phi)`

`(mu_(0)i)/(2pir)(pi + tan phi)`

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