Magnetic susceptibility of the following type does not depend upon temperature

Options

A. Diamagnetic substance
B. Ferromagnetic substance
C. Paramagnetic substance
D. Super conductors

Answer

To determine which type of magnetic susceptibility does not depend on temperature, we can analyze the behavior of different types of magnetic materials: diamagnetic, paramagnetic, and ferromagnetic substances.

### Step-by-Step Solution:

1. **Understanding Magnetic Susceptibility**:
- Magnetic susceptibility (χ) is a measure of how much a material will become magnetized in an applied magnetic field. It can vary with temperature depending on the type of material.

2. **Types of Magnetic Materials**:
- **Diamagnetic Materials**: These materials have a negative magnetic susceptibility. They are characterized by the fact that they are weakly repelled by a magnetic field. Importantly, their magnetic susceptibility does not change with temperature.
- **Paramagnetic Materials**: These materials have a positive magnetic susceptibility that is directly proportional to the temperature. As temperature increases, the susceptibility also increases.
- **Ferromagnetic Materials**: These materials have a strong positive magnetic susceptibility. Their susceptibility is dependent on temperature and decreases as the temperature increases, especially above a critical temperature (Curie temperature).

3. **Conclusion**:
- Among the three types of materials, **diamagnetic substances** are the only ones whose magnetic susceptibility does not depend on temperature.

### Final Answer:
The magnetic susceptibility that does not depend on temperature is found in **diamagnetic substances**.

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