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Magnetometry and Earth's Magnetic Field - Class XI
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In both $\tan A$ and $\tan B$ positions in a Deflection Magnetometer, the bar magnet is always placed
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A
parallel to the magnetic needle of the deflection magnetometer
💡 Explanation:
In $\tan A$ position the bar magnet is placed horizontally, parallel to the arm of the deflection magnetometer and parallel to the magnetic needle of the deflection magnetometer.
In $\tan B$ position the bar magnet is placed horizontally, perpendicular to the arm of the deflection magnetometer and parallel to the magnetic needle of the deflection magnetometer.