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JEE PHYSICS MCQ: MAGNETISM AND MATTER

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A short magnet produces a deflection of 37∘37^{\circ} in a deflection magnetometer in Tan- AA position when placed at a separation of 10 cm10 \mathrm{~cm} from the needle. Find the ratio of the magnetic moment of the magnet to the earth's horizontal magnetic field (in  A−m2 T−1\mathrm{~A-m}^2 \mathrm{~T}^{-1}).
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Correct option: A
3.75×1033.75 \times 10^3
Option A (3.75×1033.75 \times 10^3) is correct because it is calculated using the formula for the magnetic field in the Tan-A position of a deflection magnetometer.

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