A ferromagnetic core of susceptibility 799 is subjected to a magnetizing field. The permeability of the material is
(Take $μ_0 = 4 π × 10^{-7} T\, m\, A^{-1}$)
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → $3.2 π × 10^{-4}T\, m\, A^{-1}$
Given:
Magnetic susceptibility, $\chi = 799$
Relation between relative permeability and susceptibility:
$\mu_r = 1 + \chi$
$\mu_r = 1 + 799 = 800$
Absolute permeability:
$\mu = \mu_r \mu_0 = 800 \times 4\pi \times 10^{-7}$
$\mu = 3.2\pi \times 10^{-4}$