A current I ampere flows in a circular a...

A current I ampere flows in a circular arc of wire whose radius is R,Which subtends an angle `3pi//2` radius at its cectre .The magnetic induction B at the centre is

`(mu_(0)i)/R`

`(3m_(0)i)/(2R)`

`(3mu_(0)i)/(4R)`

`(3mu_(0)i)/(8R)`

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