Question

Following plots show magnetization $\left(M\right)$ vs magnetizing field $\left(H\right)$ and magnetic susceptibility $\left(\chi \right)$ vs temperature $\left(T\right)$ graphs :


Which of the following combinations will be represented by a diamagnetic material?

• A. (b), (d)
• B. (a), (c)
• C. (b), (c)
• D. (a), (d)

Answer 1

The correct option is B (a), (c)

Case- I:

When diamagnetic material is placed in magnetic field , dipole moment lies in opposite diection.

So, on increasing magnetising field $\left(H\right),$ magnetization $\left(M\right)$ will decrease in opposite direction.

Therefore, correct representation of $H$ vs $M$ is shown by (a).

Case-II:

Magnetic susceptilibity for diamagntic material is independent of tempertaure.

Therefore, correct graph will be (c).

Hence, option (a) is the correct answer.