A current loop in a magnetic field

Physics Magnetism and Matter NEET Previous Year Question MCQ (Single Correct)

can be in equilibrium in two orientations, both the equilibrium states are unstable.

can be in equilibrium in two orientations, one stable while the other is unstable.

experiences a torque whether the field is uniform or non uniform in all orientations.

can be in equilibrium in one orientation.

Text Solution

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The correct answer is:

When a current loop is placed in a magnetic field it experiences a torque. It is given by

where, is the magnetic moment of the loop and is the magnetic field.

or where is angle between and When and and are parallel the equilibrium is stable and when they are antiparallel the equilibrium is unstable.

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