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Why is soft-iron not used for making a p...

Why is soft-iron not used for making a permanent magnet?

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Steel is preferred because its coercivity is larger than soft iron.
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Draw an appropriate schematic diagram showing common domestic circuits and discuss the importance of fuse. Why is it that a burnt out fuse should be replaced by another fuse of identical ratting? or Why is pure iron not used for making permanent magnets? Name one material used for making permanent magnets. Describe how permanent magnets are made electrically. State two examples of electrical instruments made by using permanent magnets.

The alloy used for making permanent magnet is

(a) Soft iron is a conductor of electricity. (b)It is a magnetic material. ( c)It is an alloy of iron. (d)It is used for making permanent magnets.State whether:

Wrought iron is used for making

Give two characteristics of a material used for making permanent magnets.

MODERN PUBLICATION-MAGNETISM AND MATTER-REVISION EXERCISE (VERY SHORT ANSWER QUESTION)
  1. चुंबकीय क्षेत्र रेखाएँ वायु की अपेक्षा लौह चुंबकीय पदार्थों में से गुज...

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  2. Why is diamagnetism independent of temperature?

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  3. Write one important property of a paramagnetic material.

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  4. Give some examples of paramagnetic substances.

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  5. How are magnetic susceptibility 'x' and relative magnetic permeability...

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  6. चुंबकीय क्षेत्र की अनुपस्थिति में अनुचुंबकीय पदार्थ कैसा व्यवहार दर्शा...

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  7. What are ferromagnetic substances ?

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  8. Give some examples of ferromagnetic substances.

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  9. What is curie temperature?

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  10. An iron bar magneti is heated to 1000^@C and then cooled in a magnetic...

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  11. What is the effect of rise of temperature on the susceptibility of a f...

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  12. शैथिल्य ( hysteresis ) प्रदर्शित करते है

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  13. धारणशीलता ( retentivity ) से आप क्या समझते है ?

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  14. What is meant by coercivity ?

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  15. What is the basic use of hysteresis curve?

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  16. PERMANENT MAGNET

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  17. The material for making permanent magnets should have:

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  18. Why is soft-iron not used for making a permanent magnet?

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  19. Which material is used to make electromagnets and why?

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  20. Write the usage of electromagnets.

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