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प्रश्न
Compare the properties of soft and hard ferromagnetic materials.
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उत्तर
| 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. |
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संबंधित प्रश्न
What type of magnetism is shown in the following alignment of magnetic moments?
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 reason for the following :
Sulphur in vapour state shows paramagnetic behaviour.
Substances which are weakly repelled in magnetic field are known as ____________.
Which type of substances would make better permanent magnets?
Some of the polar crystals when heated produces small electrical current. This phenomenon is called ______.
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 ?
