Q: The permeability of substance is 6.28 × 10^{-4} wb/A-m. Find its relative permeability and susceptibility ?

Sol: $\large \mu_r = \frac{\mu}{\mu_0} $

$\large \mu_r = \frac{6.28 \times 10^{-4}}{4\pi \times 10^{-7}} $

μ_{r} = 500

$\large \mu_r = 1 + \chi $

$\large \chi = \mu_r – 1 = 500 -1$

χ = 499.