railway RRB JE (CBT I + CBT II) Mock Test 2024 Engineering Materials Science Structure and Properties of Engineering Materials Properties of Materials
Which of the following characteristics is true for ferromagnetic materials?
1
They retain their magnetisation even after the external magnetic field is removed.
2
They are weakly repelled by a magnetic field and have negative magnetic susceptibility.
3
They show no effect in a magnetic field and are considered neutral.
4
They are strongly attracted to a magnetic field but do not exhibit hysteresis.