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The magnetic field Intensity at the poin...

The magnetic field Intensity at the point o of a loop carrying current i as shown in the figure is

A

`(-mu_0i(18pi+5))/(48pia)hatk`

B

`(mu_0i)/(48pia)(18pi+5)hatk`

C

`(mu_0i)/(24pia)(18pi+5)hatk`

D

`(-mu_0i)/(4pia)(3pi+5)hatk`

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