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प्रश्न
A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field becuase ______.
पर्याय
all the domains get oriented in the direction of magnetic field.
all the domains get oriented in the direction opposite to the direction of magnetic field.
domains get oriented randomly.
domains are not affected by magnetic field.
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उत्तर
A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field becuase all the domains get oriented in the direction of magnetic field.
Explanation:
Ferromagnetic solids can be permanently magnetised and then all the domains get oriented in the direction of applied magnetic field.
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संबंधित प्रश्न
Iron (z=26) is highly ferromagnetic. Explain.
Define the following term:
Ferromagnetism
Write the type of magnetism observed when the magnetic moments are aligned in parallel and anti-parallel directions in unequal numbers.
What is magnetic susceptibility?
Compare the properties of soft and hard ferromagnetic materials.
When heated to high temperature, ferromagnetic substance changes to ____________.
Which type of substances would make better permanent magnets?
Assertion: On heating ferromagnetic or ferrimagnetic substances, they become paramagnetic.
Reason: The electrons change their spin on heating.
The value of magnetic moment is zero in the case of antiferromagnetic substances because the domains:
(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.
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.
Which one of the following would feel attraction when placed in magnetic field: Co2+, Ag+, Ti4+, Zn2+
The heat of combustion of a substance is:
Some of the polar crystals when heated produces small electrical current. This phenomenon is called ______.
The correct order of bond strength is ______.
Which of the following is not paramagnetic?
Match items of List - I with those of List - II:
| List - I | List - II | ||
| (Property) | (Example) | ||
| (A) | Diamagnetism | (i) | MnO |
| (B) | Ferrimagnetism | (ii) | O2 |
| (C) | Paramagnetism | (iii) | NaCl |
| (D) | Antiferromagnetism | (iv) | Fe3O4 |
Choose the most appropriate answer from the options given below:
Which one of the following compounds is diamagnetic and colourless?
Give a reason for the following:
Cu+2 salts are paramagnetic, while Cu+ salts are diamagnetic.
