Advertisements
Advertisements
प्रश्न
Compare dia, para and ferromagnetism.
How is ferromagnetism different from paramagnetism?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Iron (z=26) is highly ferromagnetic. Explain.
What type of magnetism is shown in the following alignment of magnetic moments?
What type of magnetism is shown by a substance if magnetic moments of domains are arranged in same direction?
Analysis shows that nickel oxide has the formula Ni0.98O1.00. What fractions of nickel exist as Ni2+ and Ni3+ ions?
The complexion [Ni(CN)4]2- is:
Pyrolusite ore is _______.
Compare the properties of soft and hard ferromagnetic materials.
All those atoms or molecules which have an odd number of electrons are
Substances that are strongly attracted by the applied magnetic field and can be permanently magnetized are ____________.
Which type of substances would make better permanent magnets?
Which of the following statements is not true?
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.
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 statements are correct?
- Electric monopoles do not exist whereas magnetic monopoles exist.
- Magnetic field lines due to a solenoid at its ends and outside cannot be completely straight and confined.
- Magnetic field lines are completely confined within a toroid.
- Magnetic field lines inside a bar magnet are not parallel.
- χ = -1 is the condition for a perfect diamagnetic material, where x is its magnetic susceptibility.
Among the following ions, which one has the highest paramagnetism?
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?
