Q 12-05-021NEETJEE MainMedium
A magnetising field of $1500$ A/m produces a magnetisation of $3 \times 10^5$ A/m in a sample. Its susceptibility is
Answer: (D) $200$
Concept. Susceptibility is the magnetisation per unit magnetising field: $\chi = \dfrac{M}{H}$.
Step 1. Substitute.
$$\chi = \frac{3 \times 10^5}{1500} = 200$$
Such a large value means the sample is ferromagnetic.
Answer. $200$ (Option D).
Solution by Sreeraj P, M.Sc Physics