According to Curie's law, the magnetic susceptibilty of a paramagnetic substance at an absolute temperature T is proportional to

Options

A. 1/T
B. T
C. `1//T^2`
D. `T^2`

Explanation

To solve the question regarding Curie's law and the magnetic susceptibility of a paramagnetic substance at an absolute temperature \( T \), we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Curie's Law**: Curie's law states that the magnetic susceptibility (\( \chi \)) of a paramagnetic material is inversely proportional to its absolute temperature (\( T \)). This can be mathematically expressed as:
\[ \chi \propto \frac{1}{T} \]

2. **Identifying the Relationship**: From the above expression, we can conclude that as the temperature increases, the magnetic susceptibility decreases. This is because the thermal agitation of the particles in the material tends to disrupt the alignment of magnetic moments.

3. **Expressing the Proportionality**: To express the proportionality in a more formal way, we can write:
\[ \chi = \frac{C}{T} \]
where \( C \) is a constant that depends on the material.

4. **Conclusion**: Therefore, according to Curie's law, the magnetic susceptibility of a paramagnetic substance at an absolute temperature \( T \) is proportional to:
\[ \chi \propto \frac{1}{T} \]

### Final Answer:
The magnetic susceptibility (\( \chi \)) of a paramagnetic substance at an absolute temperature \( T \) is proportional to \( \frac{1}{T} \).

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