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प्रश्न
Compare dia, para and ferromagnetism.
How is ferromagnetism different from paramagnetism?
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उत्तर
| Diamagnetism | Paramagnetism | Ferromagnetism | |
| 1. | A force tends to move the material from the stronger part to the weaker part of the external field. | Weak magnetism in the direction of the applied field. | Strong magnetism in the direction of the applied field. |
| 2. | Each electron has finite orbital magnetic dipole moments. | Each atom has a net magnetic dipole moment. | Have a net dipole moment as in a paramagnetic material. |
| 3. | Since the orbital planes are orientated in a random manner, the vector sum of magnetic moments is zero. | Due to the random orientation of the magnetic moments, the net magnetic moment of the material is zero. | Within each domain, the magnetic moments are spontaneously aligned in a direction. |
| 4. | The resultant magnetic moment for each atom is zero. | There is a net magnetic dipole moment induced in the direction of the applied field. | Since the direction of magnetisation varies from domain to domain, the net magnetisation of the specimen is zero. |
| 5. | E.g.: Bismuth, copper, water, etc. | E.g.: Aluminium, platinum, oxygen, etc. | E.g.: Iron, cobalt, nickel, etc. |
Notes
Students should refer to the answer according to their questions.
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संबंधित प्रश्न
Explain the following with suitable examples:
Paramagnetism
Explain why:
(i) Transition elements form coloured compounds.
(ii) Interhalogen compounds are more reactive than their constituent elements.
(iii) Cu+ is diamagnetic but Cu2+ is paramagnetic. (Z = 29)
Give the properties of dia/para/ferromagnetic materials.
Compare the properties of soft and hard ferromagnetic materials.
When heated to high temperature, ferromagnetic substance changes to ____________.
Fe3O4 is ____________.
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.
Fe3O4 (magnetite) is an example of ___________.
A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field becuase ______.
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 one of the following would feel attraction when placed in magnetic field: Co2+, Ag+, Ti4+, Zn2+
Given below are two statements labelled as Assertion (A) and Reason (R).
Assertion: Magnetic moment values of actinides are lesser than the theoretically predicted values.
Reason: Actinide elements are strongly paramagnetic.
Select the most appropriate answer from the options given below:
Magnetic materials used for making permanent magnets (P) and magnets in a transformer (T) have different properties of the following, which property best matches for the type of magnet required ?
The correct order of bond strength is ______.
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?
Which one of the following compounds is diamagnetic and colourless?
