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GATE 2022 MT – Question 39

Materials Science and Non-Metallic Materials · Electronic and magnetic properties · 2 marks · Multiple choice

Figures P, Q, R and S schematically show the atomic dipole moments in the absence of external magnetic field. Which one of the following is the correct mapping of nature of magnetism to atomic dipole moments?

Diagram for GATE 2022 MT question 39
  1. P − Diamagnetism, Q − Antiferromagnetism, R − Paramagnetism, S − Ferromagnetism
  2. P – Ferromagnetism, Q − Antiferromagnetism, R – Diamagnetism, S − Paramagnetism
  3. P – Paramagnetism, Q – Ferromagnetism, R – Diamagnetism, S − Antiferromagnetism
  4. P – Ferromagnetism, Q – Diamagnetism, R – Antiferromagnetism, S − Paramagnetism

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Show answer and explanation

Correct answer: (B) P – Ferromagnetism, Q − Antiferromagnetism, R – Diamagnetism, S − Paramagnetism

Explanation

Parallel aligned moments in P indicate ferromagnetism; equal opposing moments in Q indicate antiferromagnetism. R has no permanent moments, characteristic of diamagnetism; S has randomly oriented permanent moments, characteristic of paramagnetism.

Thus **B**.