GATE Materials Science and Non-Metallic Materials: Electronic and magnetic properties – Previous Year Questions

5 GATE previous year questions on Electronic and magnetic properties (Materials Science and Non-Metallic Materials, Metallurgical Engineering) with answers and explanations, from every paper.

1. GATE 2021 MT Q30 (1 mark, Numerical answer) – Iron’s room-temperature saturation magnetization is 1700 kA/m and lattice parameter 0.287 nm. Its per-atom magnetic moment is 10-23 A·m2 (one decimal…
2. GATE 2022 MT Q39 (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…
3. GATE 2023 MT Q43 (2 marks, Multiple choice) – Match materials with their classes. Column I: P. Gallium arsenide Q. Barium titanate R. Iron–4 wt.% silicon S. Yttrium–barium–copper oxide Column II:…
4. GATE 2025 MT Q57 (2 marks, Numerical answer) – An intrinsic semiconductor has conductivity 100 Ω-1 m-1 at 300 K and 300 Ω-1 m-1 at 500 K. Its band gap is eV (rounded to two decimal places). Given:…
5. GATE 2026 MT Q42 (2 marks, Multiple choice) – Match the terms in Column I with the corresponding attributes in Column II. Column I: (P) Wiedemann–Franz law (Q) Néel temperature (R) Hall voltage…