Which of the following is not correct about relative magnetic permeability `(mu_(r))`?

Explain Magnetic permeability (mu)

What is relative magnetic permeability of superconductors?

What is relative magnetic permeability of superconductors?

What is the nature of magnetic susceptibility and relative magnetic permeability (mu_r) in case of paramagnetic substances?

A toroid wound with 100 turns /m of wire carries a current of 3 A. The core of toroid is made of iron having relative magnetic permeability of mu_(r)= 5000 mu_(0) under given conditions. The magnetic field inside the iron is …........ (Tackle mu_0 = 4pi xx 10^(-7) T mA^(-1) )