Q. As magnetising field on a ferromagnetic material is increased, its permeability
A) Increases
B) Decreases
C) Remains constant
D) Cannot say
Explanation
(b) For lower magnetising fields, $\mu = B/H$ is high, as is clear from shape of hysteresis curve. As $H$ increases, $\mu$ decreases.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.