A soft iron core inside an electromagnet experiences an internal magnetic field of…
PHYSICS · Single correct · CBSE · Physics · Magnetism and Matter · Magnetism and Matter
Problem
A soft iron core inside an electromagnet experiences an internal magnetic field of 0.60T while the coil is energized. Immediately after the current is switched off, the field inside the core drops to 0.06T. Approximately what percentage of the core’s original magnetization remains after the external field is removed?
(a) 6\%
(b) 10\%
(c) 90\%
(d) 1\%