MHT CET 2024 Physics question
The coil P and Q each of radius R carry currents I and respectively in same direction. Those coils are lying in perpendicular planes such that they have a common centre. The magnitude of the magnetic field at the common centre of the two coils is ( = permeability of free space)
Answer: (B)
Solution
The field at the centre of a circular coil of radius carrying current is , directed along the axis of the coil. So and . The planes of the coils are perpendicular, so the two fields are perpendicular to
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