Question

The magnetic permeability \( \mu \) of a paramagnetic substance is:

• A. \( \mu>1 \)
• B. \( \mu = 1 \)
• C. \( \mu = 0 \)
• D. \( \mu \text{ is infinite} \)

Hint:

For paramagnetic substances, the magnetic permeability \( \mu \) is slightly greater than 1, indicating that these materials are weakly attracted to a magnetic fiel(D)

Answer 1

The Correct Option is A

Magnetic permeability \( \mu \) is the measure of how a material responds to a magnetic fiel(D) For different types of materials, the value of \( \mu \) varies:
- In vacuum, the magnetic permeability is \( \mu_0 \) (constant) and is equal to \( 4\pi \times 10^{-7} \, \text{T m/A} \).
- For ferromagnetic materials, \( \mu \) is much greater than 1.
- For paramagnetic materials, \( \mu \) is slightly greater than 1.
- For diamagnetic materials, \( \mu \) is slightly less than 1.
Since paramagnetic substances have a weak attraction to a magnetic field, their permeability is just slightly greater than 1. This is why the correct answer is \( \mu>1 \).
Thus, the magnetic permeability \( \mu \) of a paramagnetic substance is greater than 1.