Question

A paramagnetic substance is placed in a weak magnetic field and its absolute temperature $T$ is increased. As a result, its magnetisation

• A. increases in proportion to $T$
• B. decreases in proportion to $\frac{1}{T}$
• C. increases in proportion to $T^{2}$
• D. decreases in proportion to $\frac{1}{T^{2}}$

Answer 1

Answer: (B)

decreases in proportion to $\frac{1}{T}$

Answer 2

The magnetisation
$I \propto \frac{1}{T}$
As temperature is increased the magnetisation decreases.