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प्रश्न
What type of substances would make better permanent magnets, ferromagnetic or ferrimagnetic. Justify your answer.
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उत्तर
Ferromagnetic substances would make better permanent magnets.
In solid state, the metal ions of ferromagnetic substances are grouped together into small regions. These regions are called domains and each domain acts as a tiny magnet. In an unmagnetised piece of a ferromagnetic substance, the domains are randomly oriented. As a result, the magnetic moments of the domains get cancelled. However, when the substance is placed in a magnetic field, all the domains get oriented in the direction of the magnetic field and a strong magnetic effect is produced.
The ordering of the domains persists even after the removal of the magnetic field. Thus, the ferromagnetic substance becomes a permanent magnet.
संबंधित प्रश्न
What type of magnetism is shown in the following alignment of magnetic moments?
Define the following term:
Ferromagnetism
Write the type of magnetism observed when the magnetic moments are oppositely aligned and cancel out each other.
Write the type of magnetism observed when the magnetic moments are aligned in parallel and anti-parallel directions in unequal numbers.
Explain the following with suitable examples:
Ferrimagnetism
Explain the following with suitable examples:
Antiferromagnetism
The complexion [Ni(CN)4]2- is:
Compare dia, para and ferromagnetism.
Give the properties of dia/para/ferromagnetic materials.
Compare the properties of soft and hard ferromagnetic materials.
Example of ferromagnetic substance is ____________.
All those atoms or molecules which have an odd number of electrons are
Which of the following arrangements shows schematic alignment of magnetic moments of antiferromagnetic substances?
Which one of the following would feel attraction when placed in magnetic field: Co2+, Ag+, Ti4+, Zn2+
Some of the polar crystals when heated produces small electrical current. This phenomenon is called ______.
The value of aluminium susceptibility is 2.2 × 10-5. The percentage increase in the magnetic field if space within a current carrying toroid is filled with aluminium is `"x"/10^4`. Then the value of x is ______.
Among the following ions, which one has the highest paramagnetism?
Give a reason for the following:
Cu+2 salts are paramagnetic, while Cu+ salts are diamagnetic.
