Question

The magnetic susceptibility is negative for:

• A. paramagnetic materials.
• B. ferromagnetic materials.
• C. superconducting materials.
• D. diamagnetic materials.

Hint:

Remember: "Dia" is "Opposite"—diamagnetic materials oppose the field, so their sign is negative.

Answer 1

The Correct Option is D

Step 1: Concept
Magnetic susceptibility ($\chi$) measures how much a material becomes magnetized in an applied magnetic field.

Step 2: Meaning
A negative susceptibility indicates that the material develops an induced magnetization in a direction opposite to the applied external magnetic field.

Step 3: Analysis
Paramagnetic and ferromagnetic materials have positive susceptibility as they are attracted to magnetic fields. Diamagnetic materials are repelled by magnetic fields, resulting in a negative value for $\chi$.

Step 4: Conclusion
Therefore, diamagnetic materials characterized by this property always have negative magnetic susceptibility. Final Answer: (D)