NEET Physics Moving Charges and Magnetism Questions Solved

Two straight long conductors AOB and COD are perpendicular to each other and carry currents i1 and i2 . The magnitude of the magnetic induction at a point P at a distance a from the point O in a direction perpendicular to the plane ACBD is  

(a) μ02πa(i1+i2)                    (b) μ02πa(i1-i2)

(c) μ02πai12+i221/2                (d) μ02πai1i2(i1+i2)

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