A current loop, having two circular arcs...

A current loop, having two circular arcs jo ined by two radial lines is shown in the figure. It carries a current of 10 A. The magnetic field at point O will be close to :

A

`1.0xx10^(-7) T `

B

`1.5xx10^(-7) T`

C

`1.5xx10^(-5) T `

D

`1.0xx^(-5) T`

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