A ferromagnetic material is
A) always a magnet
B) a magnet if it's domains are aligned
C) a magnet if it's domains are not aligned
D) never a magnet
I think it is A....
Nope. If one heats a ferromagnetic material red hot, then quinces it in water, it is not magnetic...
Oh gosh...then would it be B?
The correct answer is B) a magnet if its domains are aligned.
To explain how to arrive at this answer, let's first understand what a ferromagnetic material is. Ferromagnetic materials are substances that have a high susceptibility to being magnetized in the presence of an external magnetic field. They can retain their magnetization even after the external field is removed.
Ferromagnetic materials consist of microscopic regions called domains. Each domain contains aligned atomic magnetic moments, which act like tiny magnets. When the domains are randomly oriented, the material as a whole does not exhibit a significant magnetic effect. However, when the domains become aligned due to an external magnetic field, the material can become magnetized.
Now, let's consider the options:
A) "Always a magnet": This option is not correct because a ferromagnetic material is not always a magnet. It only becomes a magnet when its domains are aligned.
B) "A magnet if its domains are aligned": This option is the correct answer. When the domains in a ferromagnetic material are aligned, the material exhibits magnetism.
C) "A magnet if its domains are not aligned": This option is incorrect. If the domains are not aligned, the material does not exhibit a significant magnetic effect.
D) "Never a magnet": This option is incorrect because ferromagnetic materials have the potential to become magnets when their domains align.
Therefore, the correct answer is B) a magnet if its domains are aligned.