Two identical short bar magnets, each having magnetic moment M, are placed a distance of 2d apart with axes perpendicular to each other in a horizontal plane. The magnetic induction at a point midway between them is
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a
μ04π2Md3
b
μ04π3Md3
c
2μ0πMd3
d
μ04π5Md3
answer is D.
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Detailed Solution
At point P net magnetic field, Bnet=B12+B22where B1=μ04π.2Md3 and B2=μ04π.Md3⇒Bnet=μ04π.5Md3