Question

Magnetic hysterisis is exhibited by __ magnetic materials.

• A. only para
• B. only dia
• C. only ferro
• D. both para and ferro

Answer 1

The Correct Option is C

Magnetic hysteresis refers to the lag between magnetization and the external magnetic field. This phenomenon occurs when a material retains some magnetization even after the external field is removed.

Only ferromagnetic materials exhibit magnetic hysteresis because they have domains that remain aligned even after removing the field. This gives rise to the characteristic hysteresis loop.

• Paramagnetic materials do not retain magnetism; they align only when the field is applied.
• Diamagnetic materials create a weak repulsion and do not exhibit hysteresis.

Conclusion:

Magnetic hysteresis is exhibited only by \( {\text{ferromagnetic materials}} \), so the correct answer is (C).

Answer 2

Magnetic hysteresis refers to the lag between changes in the magnetizing force and the magnetic field in certain materials. It is primarily exhibited by ferromagnetic materials. These materials, such as iron and steel, retain a portion of their magnetization even after the external magnetic field is removed, showing hysteresis.
\(\textbf{Para}\) and \(\textbf{dia}\) magnetic materials do not exhibit hysteresis because their magnetic dipoles align with the external magnetic field and quickly return to their original state once the field is removed.

Thus, magnetic hysteresis is exhibited only by ferromagnetic materials.