Concepts Of Physics MCQ Edition [Volume 2]PhysicsMagnetic Properties of Matter
Identify the correct statements from the following.
Options
- ADiamagnetism arises from the partial alignment of permanent magnetic moments.
- BThe magnetic field generated by an induced magnetic moment is directed opposite to the applied field.
- CIn free space, the magnetizing field intensity H remains always zero.
- DDiamagnetism is present in all materials.
Correct answer
D. Diamagnetism is present in all materials.
Step-by-step solution
Diamagnetism arises due to the induced change in the orbital motion of electrons when an external magnetic field is applied. It does not arise from permanent magnetic moments. Thus, statement (1) is incorrect. According to Lenz's law, the induced magnetic moment in a diamagnetic material develops in a direction such that it opposes the applied magnetic field. Thus, statement (2) is correct. In free space, the magnetic induction B and magnetizing field intensity H are related by B = ₀ H . If a magnetic field exists