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Why are coils of electric toasters and e...

Why are coils of electric toasters and electric irons made of an alloy rather than a pure metal ?

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The material of the coil should have high resistivity as well as should have high melting point. Alloys have higher resistivity and melting point in pure metals. Hence coil of an alloy (nichrome) is used.
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MBD -HARYANA BOARD-MAGNETIC EFFECTS OF ELECTRIC CURRENT-Short Answer Type Questions
  1. Compare the permanent magnet and an electromagnet.

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  2. Why are coils of electric toasters and electric irons made of an alloy...

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  3. Write note on magnetic field in human being and animals.

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  4. A generator or dynamo works on the principle:

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  5. What are hazards of electricity ?

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  6. What the two main precautions to be taken while using an electric supp...

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  7. Distinguish between the terms 'overloading' and 'short-circuiting' as ...

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  8. Describe an experiment to illustrate the action of an electric fuse.

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  9. What is the necessity of earthing an electric appliance ?

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  10. State Fleming's left-hand rule.

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  11. Write Fleming's left hand rule.

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  12. What is the role of the split-ring in an electric motor?

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  13. Explain different ways to induce current in a coil.

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  14. Name some sources of direct current.

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  15. Which sources produce alternating current?

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  16. Name two safety measures commonly used in electric circuits and applia...

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  17. What precaution should be taken to avoid the overloading of domestic e...

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  18. State the right hand thumb rule.

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  19. Explain the use of Fleming,s right-hand rule in finding the direction ...

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  20. State one advantage of AC over DC.

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