Bar magnet, magnetic dipole, Earth's magnetism, dia/para/ferromagnetism.
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Q1 · Magnetism and Matter (Class 12) · MEDIUM
A bar magnet of magnetic moment 2.5 A m² is freely suspended in a uniform magnetic field of intensity 0.4 T. The work done in rotating the magnet from its equilibrium position through an angle of 60° is:
Q2 · Magnetism and Matter (Class 12) · EASY
The horizontal component of Earth's magnetic field at a place is 3.0 × 10⁻⁵ T and the angle of dip is 30°. The vertical component of Earth's magnetic field at that place is:
Q3 · Magnetism and Matter (Class 12) · HARD
Two similar bar magnets of magnetic moments M each are placed perpendicular to each other with their north poles in contact. The resultant magnetic moment of the combination is:
Q4 · Magnetism and Matter (Class 12) · EASY
A bar magnet of magnetic moment 5 A·m² is placed in a uniform magnetic field of 0.4 T making an angle of 30° with the field. The torque acting on the magnet is