Advertisements
Advertisements
प्रश्न
Explain the following with suitable examples:
Ferrimagnetism
Advertisements
उत्तर
- The substances in which the magnetic moments of the domains are aligned in parallel and anti-parallel directions, in unequal numbers, are said to have ferrimagnetism.
- Examples include Fe3O4 (magnetite), ferrites such as MgFe2O4 and ZnFe2O4.
- Ferrimagnetic substances are weakly attracted by a magnetic field as compared to ferromagnetic substances. On heating, these substances become paramagnetic.
Schematic alignment of magnetic moments in ferrimagnetic substances
संबंधित प्रश्न
Define the following term:
Ferromagnetism
Write the type of magnetism observed when the magnetic moments are oppositely aligned and cancel out each other.
What type of substances would make better permanent magnets, ferromagnetic or ferrimagnetic. Justify your answer.
Explain the following with suitable examples:
Paramagnetism
Give reasons:Ferrimagnetic substances show better magnetism than antiferromagnetic substances.
Give reason for the following :
Sulphur in vapour state shows paramagnetic behaviour.
What is magnetic susceptibility?
Compare dia, para and ferromagnetism.
Substances which are weakly repelled in magnetic field are known as ____________.
When heated to high temperature, ferromagnetic substance changes to ____________.
Fe3O4 is ____________.
Assertion: On heating ferromagnetic or ferrimagnetic substances, they become paramagnetic.
Reason: The electrons change their spin on heating.
A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field becuase ______.
Which one of the following would feel attraction when placed in magnetic field: Co2+, Ag+, Ti4+, Zn2+
Which one of the following pairs has only paramagnetic species?
The heat of combustion of a substance is:
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 ______.
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.
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?
The metal complex ion that is paramagnetic is ______.
(Atomic number of Fe = 26, Cu = 29, Co = 27 and Ni = 28)
