Question

Consider the following statements.
$1$. The susceptibility of a paramagnetic material varies inversely as the temperature.
$2$. The susceptibility of a diamagnetic material is small and negative.
$3$. The relative permeability of a diamagnetic material is less than unity.
$4$. The relative permeability of a paramagnetic material is greater than unity.
Which of the statements given are correct?

• A. $1,2$ and $3$
• B. $2,3$ and $4$
• C. $1,3$ and $4$
• D. $1,2,3$ and $4$

Answer 1

Answer: (D)

$1,2,3$ and $4$

Magnetic susceptibility of paramagnetic material is positive and very small but it is inversely proportional to the temperature. Its relative permeability is slightly greater than unity. Magnetic susceptibility of diamagnetic material is negative and small and its relative permeability is less than unity.
So, all the statements are true.