Question

Relative permeability (\(\mu_r\)) of a sample is given by \(1<\mu_r<1 + \epsilon\), where \(\epsilon\) is a small positive number. Then the nature of the sample is:

• A. Diamagnetic material
• B. Paramagnetic material
• C. Ferro magnetic material
• D. Super conducting material

Hint:

When the relative permeability (\(\mu_r\)) of a material is close to 1 but slightly greater than 1, the material is typically paramagnetic.

Answer 1

The Correct Option is B

The relative permeability of a material (\(\mu_r\)) is a measure of how much the material becomes magnetized when exposed to a magnetic field. When the relative permeability is slightly greater than 1, it indicates that the material is weakly attracted to magnetic fields, which is characteristic of paramagnetic materials.

Given the condition that \(1 < \mu_r < 1 + \epsilon\), where \(\epsilon\) is a small positive number, the material is identified as paramagnetic.

Thus, the material is paramagnetic.