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The torque on a bar magnet due to the earth's magnetic field is maximum when the axis of the magnet is

1. Perpendicular to the field of the earth
2. Parallel to the vertical component of the earth's field
3. At an angle of 33 o with respect to the N - S direction
4. Along the North-South ( N - S ) direction

Correct answer: Perpendicular to the field of the earth

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