1000 turns per meter are wound over a Rowland ring of ferromagnetic material. On passing a current of 2 ampere in the coil, a magnetic field of 10 Wb/m2 is produced in it.
The relative permeability of the material will be :
Answer & explanation
Correct answer: option 4
$\mu_r = 1+ \chi = 1+ \frac{I}{H} = 1+ \frac{7.96\times 10^6}{2\times 10^3} = 3.98\times 10^3$