Question

Magnets are made of______.

• A. Iron
• B. Steel
• C. Copper
• D. Both (A) and (B)

Answer 1

The correct option is D

Both (A) and (B)

Explanation for Correct Option:

1. Permanent magnets are also called ferromagnets.
2. It contains permanent atomic diploes which interact strongly with each other and may cause spontaneous magnetization within a single domain even in the absence of an external field.
3. They are strongly attracted by magnetic fields.
4. A small external field can cause large magnetization.
5. Magnetization depends on the past history of the specimen and it shows the phenomenon of hysteresis.
6. Examples of ferromagnetic materials are $\mathrm{Fe},\mathrm{Ni},\mathrm{Co},\mathrm{Gd}$.
7. Hence, magnets can be made of iron.
8. Steel is an alloy of iron.
9. Hence, magnets can be made of steel.
10. Magnets cannot be made of copper since copper is a diamagnetic material.

Since both option (A) and (D) are correct, option (D) is the correct answer.