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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 d from the point O in a direction perpendicular to the plane ABCD is

a
μ02πd I1 + I2
b
μ04πd I1 + I2
c
μ02πd I12 + I22
d
μ02πd I1I2I1+I2

detailed solution

Correct option is C

Here, point P is placed symmetrically with respect to two conductors. The magnetic fields due to the conductors are mutually perpendicular. Their resultant is given byBr=μ02πd I12 + I22

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