Question

A metal rod of susceptibility \(799\) is subjected to a magnetising field of \(2000\,\text{A m}^{-1}\). The permeability of the material of the rod is: (Given \(\mu_0 = 4\pi \times 10^{-7}\,\text{T m A}^{-1}\))

• A. \(4.2\pi \times 10^{-7}\,\text{T m A}^{-1}\)
• B. \(3.2\pi \times 10^{-4}\,\text{T m A}^{-1}\)
• C. \(2.4\pi \times 10^{-5}\,\text{T m A}^{-1}\)
• D. \(80\pi \times 10^{-7}\,\text{T m A}^{-1}\)

Hint:

Permeability depends on susceptibility using \(\mu = \mu_0(1+\chi)\). Field strength is not needed unless magnetisation is asked.

Answer 1

The Correct Option is B