Two identical magnetic dipoles of magnetic moments 1.0 A-m2 each, placed at a separation of 2m with their axes perpendicular to each other, The resultant magnetic field at a point mid-way between the dipoles is

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5×10−7 T

10−7 T

2×10−7 T

answer is B.

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Detailed Solution

P1→=P2→=PB1=μ04π.P1r/23=μ04π8P1r3=10−7TB2=μ04π×2P1r/23=μ04π16P2r3=2×10−7T∴B=B12+B22=5×10−7T

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