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Magnetic Properties of Matter — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsMagnetic Properties of Matter1 Mark
Question
A perpendicular material is place in a magnetic fields. Consider the following statemetns:
  1. If the magnetic field is increased, the magnetization is increased.
  2. If the temperature is increased, the magnetization is increased.
  1. Both A and B are true.
  2. A is true but B is false.
  3. B is true but A is false.
  4. Both A and B are false.
✓

Answer

  1. A is true but B is false.

Explanation:

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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