1.

Equal current 'i' flows in the two segments of a circular loop in the direction shown in fig. radius fo the loop is 'a'. Magnetic field at the centre of the loop is

Answer»

ZERO
`((pi - theta)/( pi)) ( mu_0 i)/( 2a)`
`((2 pi - theta)/( pi))(mu_0 i)/( 2a)`
`((theta)/ ( 2pi)) ( mu_0 i)/( 2a)`

ANSWER :B


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