Question
Physics Question on Magnetism and matter
Domain formation is the necessary feature of
A
ferromagnetism
B
paramagnetism
C
diamagnetism
D
all of these
Answer
ferromagnetism
Explanation
Solution
Ferromagnetism materials exhibit a long range ordering phenomenon at the atomic level which causes the unpaired electron spins to line up parallel with each other in a region called domain. Within the domain, the magnetic field is intense, but in a bulk sample the material will usually be unmagnetised because the many domains will themselves be randomly oriented with respect to one another. Hence, domain formation is the necessary feature of ferromagnetic substance.