OnlineCBT
Physics · PYQ NEET UG 2020
हिन्दीAn iron rod of susceptibility \( 599 \) is subjected to a magnetising field of \( 1200\text{ A m}^{-1} \). The permeability of the material of the rod is: (\( \mu_0 = 4\pi \times 10^{-7}\text{ T m A}^{-1} \))
Correct answer · Option 4
\( 2.4\pi \times 10^{-4}\text{ T m A}^{-1} \)
Explanation
Permeability \( \mu = \mu_0(1 + \chi_m) = 4\pi \times 10^{-7} \times (1 + 599) = 4\pi \times 10^{-7} \times 600 = 2.4\pi \times 10^{-4}\text{ T m A}^{-1} \).
