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Compare the permanent magnet and an elec...

Compare the permanent magnet and an electromagnet.

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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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