Magnetism and Matter: NEET questions with solutions

NEET tests a bar magnet as a magnetic dipole (torque, potential energy, work to turn it, axial and equatorial fields), Gauss's law for magnetism, the relations B = μ₀(H + M) and M = χH, and the classification of dia-, para- and ferromagnetic materials with examples. Marks are lost on the angle and sign in −mB cos θ, on the direction of the equatorial field, and on mixing up χ with μᵣ.