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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
Write the type of magnetism observed when the magnetic moments are oppositely aligned and cancel out each other.
Write the type of magnetism observed when the magnetic moments are aligned in parallel and anti-parallel directions in unequal numbers.
The complexion [Ni(CN)4]2- is:
Assertion: On heating ferromagnetic or ferrimagnetic substances, they become paramagnetic.
Reason: The electrons change their spin on heating.
Which of the following arrangements shows schematic alignment of magnetic moments of antiferromagnetic substances?
A ferromagnetic substance becomes a permanent magnet when it is placed in a magnetic field becuase ______.
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 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 ______.
Give a reason for the following:
Cu+2 salts are paramagnetic, while Cu+ salts are diamagnetic.
The calculated spin only magnetic moment of Cr2+ ion is ______.
