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Magnetic poles and magnetic compass - class-VII
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A DMM is arragned at the magnetic pole of earth in $\tan{A}$ position. If a bar magnet is placed at some distance from the needle, deflection is
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A
${0}^{o}$
💡 Explanation:
At the magnetic poles, the horizontal component of the Earth's magnetic field (BH) is zero. In a tan A position, the needle aligns with the resultant field. Since BH = 0, the needle will be vertical (dip = 90 degrees), but the question asks for deflection in a horizontal DMM setup, which results in 0 degrees as there is no horizontal field to deflect it.