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The magnetic field at centre O of the ar...

The magnetic field at centre O of the arc in Fig.

A

`(mu_(0)I)/(4pi)xx(2I)/r[sqrt(2)+pi]`

B

`(mu_(0)I)/(4pi)xx(2I)/r[sqrt(2)+pi/4]`

C

`(mu_(0))/(4pi)xx(I)/r[sqrt(2)+pi]`

D

`(mu_(0))/(4pi)xx(I)/r[sqrt(2)+pi/4]`

Text Solution

Verified by Experts

The correct Answer is:
B
Distance of stright conductor from
`B=(mu_(0)Ixxsqrt(2))/(2pir)+(mu_(0)I)/(2r) (pi)/(2xx2pi)`
Or `B=(mu_(0)I)/(4pi)+(2I)/r[sqrt(2) (pi)/4]`.
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