Question

In a permanent magnet at room temperature,

(a) The magnetic moment of each molecule is zero
(b) The individual molecules have a non-zero magnetic moment which is all perfectly aligned
(c) Domains are partially aligned
(d) Domains are all perfectly aligned

Answer 1

(d) As we know a permanent magnet is a substance which at room temperature retain the ferromagnetic property for a long The magnetic.

The individual atoms in a ferromagnetic material possess a dipole moment as in a paramagnetic material.

However, they interact with one another in such a way that they spontaneously align themselves in a common direction over a macroscopic volume called domain. Thus, we can say that in a permanent magnet at room temperature, a are all perfectly aligned.