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प्रश्न
Which of the following statements are correct?
(i) Ferrimagnetic substances lose ferrimagnetism on heating and become paramagnetic.
(ii) Ferrimagnetic substances do not lose ferrimagnetism on heating and remain ferrimagnetic.
(iii) Antiferromagnetic substances have domain structures similar to ferromagnetic substances and their magnetic moments are not cancelled by each other.
(iv) In ferromagnetic substances all the domains get oriented in the direction of magnetic field and remain as such even after removing magnetic field.
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उत्तर
(i) Ferrimagnetic substances lose ferrimagnetism on heating and become paramagnetic.
(iv) In ferromagnetic substances all the domains get oriented in the direction of magnetic field and remain as such even after removing magnetic field.
Explanation:
Ferrimagnetic substances lose ferrimagnetism on heating and become paramagnetic. In ferromagnetic substance, domains are aligned in parallel and antiparallel direction in unequal numbers.
In ferromagnetic substances, all the domains get oriented in the direction of magnetic field and remain as such even after removing magnetic field.
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संबंधित प्रश्न
What type of magnetism is shown by a substance if magnetic moments of domains are arranged in same direction?
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Antiferromagnetism
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Give reason for the following :
Sulphur in vapour state shows paramagnetic behaviour.
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Which type of substances would make better permanent magnets?
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(i) get oriented in the direction of the applied magnetic field.
(ii) get oriented opposite to the direction of the applied magnetic field.
(iii) are oppositely oriented with respect to each other without the application of magnetic field.
(iv) cancel out each other’s magnetic moment.
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(Atomic number of Fe = 26, Cu = 29, Co = 27 and Ni = 28)
