NEET Physics Bar Magnet MCQ Question
Which of the following statements about bar magnets and their behavior in a magnetic field is correct?
A bar magnet experiences maximum torque when aligned at 90° to the external magnetic field.
The magnetic moment of a bar magnet remains constant regardless of its orientation in a magnetic field.
Bar magnets can have their magnetic field lines cross each other under certain conditions.
The work done in moving a bar magnet from its stable to unstable position is always zero.
Correct Answer
Detailed Explanation
A bar magnet does experience maximum torque when it is at 90° to the external magnetic field, as the torque is dependent on the angle of alignment (τ = mB sin θ). The other options reflect misconceptions about magnetic moments and field lines.
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