Question

Magnetic susceptibility (Ψ) of a material is found to decrease with the rise in its temperature. The material is ______

Options

• diamagnetic.

• paramagnetic.

• ferromagnetic.

• not magnetic.

Answer 1

Magnetic susceptibility (Ψ) of a material is found to decrease with the rise in its temperature. The material is paramagnetic.

Explanation:

The relationship between magnetic susceptibility (χ) and temperature (T) for a paramagnetic material is described by Curie’s Law:

χ = `C/T`

In this equation, C is the Curie constant. Because of this inverse relationship, as the temperature rises, the thermal agitation increases, making it harder for the magnetic dipoles to align with the external field. Thus, the susceptibility decreases.