Advertisements
Advertisements
Question
Compare the properties of soft and hard ferromagnetic materials.
Advertisements
Solution
| Properties | Soft ferromagnetic materials | Hard ferromagnetic materials |
| 1. Absence of external field. | Magnetisation disappear | Magnetisation remains |
| 2. Area of the loop | Small | Large |
| 3. Retentivity | Low | High |
| 4. Coercivity | Low | High |
| 5. Susceptibility and magnetic permeability | High | Low |
| 6. Hysteresis loss | Less | More |
| 7. Uses | Solenoid core, transformer core, and electromagnets | Permanent magnet |
| 8. Examples | Soft iron, Mumetal, Stelloy, etc. | Steel, Alnico, Lodestone, etc. |
APPEARS IN
RELATED QUESTIONS
Iron (z=26) is highly ferromagnetic. Explain.
What type of magnetism is shown in the following alignment of magnetic moments?
Analysis shows that nickel oxide has the formula Ni0.98O1.00. What fractions of nickel exist as Ni2+ and Ni3+ ions?
Example of ferromagnetic substance is ____________.
Assertion: On heating ferromagnetic or ferrimagnetic substances, they become paramagnetic.
Reason: The electrons change their spin on heating.
Which of the following statements is not true?
Which one of the following pairs has only paramagnetic species?
Which one of the following homo-diatomic molecule is paramagnetic?
The heat of combustion of a substance 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.
