Question

What happens, when a magnetic substance is heated?

• A. Remains the same.
• B. It loses its magnetism.
• C. It becomes a strong magnet.
• D. It does not affect magnetism.

Answer 1

The correct option is B

It loses its magnetism.

The explanation for the correct option:

In the case of option B,

Magnetic substance:

1. Magnetic substances are substances that are attracted by either a magnet.
2. Iron, cobalt, nickel, and other metals are examples.
3. The temperature at which some magnetic materials' magnetic characteristics change dramatically is called magnetic temperature or curie temperature.

Curie's law:

Magnetization in a paramagnetic substance is linearly proportional to the imposed magnetic field. Whenever the item is heated, the magnetization would be thought to be inversely proportional to the temperature.

Mathematical representation:

$\mathrm{M}=\mathrm{C}\times \frac{\mathrm{B}}{\mathrm{T}}$

Here,

M is magnetism.

B is the magnetic field.

T is the absolute temperature.

C is the curie constant.

Therefore, option B is the correct answer.