A perpendicular material is place in a magnetic fields. Consider … - Vidyadip

MCQ

A perpendicular material is place in a magnetic fields. Consider the following statemetns:
If the magnetic field is increased, the magnetization is increased.
If the temperature is increased, the magnetization is increased.

A
Both A and B are true.
✓
A is true but B is false.
C
B is true but A is false.
D
Both A and B are false.

✓

Answer

Correct option: B.

A is true but B is false.

A paramagnetic material is placed in a magnetic field.

Þ If the magnetic field is increased, the magnetization is increased.

$\therefore\text{Magnetiazation}\overrightarrow{\text{I}}=\frac{\text{Magnetic Moment}}{\text{volume}}=\frac{\overrightarrow{\text{M}}}{\text{V}}$

Þ If the temperature is increaed, the magnetization is decreased.

Because susceptibility of a paramagnetic substance is inversely proportional to the absolute temperarue.

$\text{X}=\frac{\text{C}}{\text{T}}$

after curie temperature susceptibility varies with temperature as $\text{X}=\frac{\text{C}^1}{\text{T}-\text{T}_\text{C}}$

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