MCQ
In a permanent magnet at room temperature
- AMagnetic moment of each molecule is zero
- BThe individual molecules have non-zero magnetic moment which are all perfectly aligned
- CDomains are partially aligned
- ✓Domains are all perfectly aligned
✓
Answer
Correct option: D.
Domains are all perfectly aligned
d
As we know a permanent magnet is a substance which at room temperature retain ferromagnetic property for a long period of time. 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, domains are all perfectly aligned.
As we know a permanent magnet is a substance which at room temperature retain ferromagnetic property for a long period of time. 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, domains are all perfectly aligned.
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