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How do you magnetisea piece of magnetic ...

How do you magnetisea piece of magnetic material ?

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A piece of magnetic material can be magnetised by keeping it inside a current -carrying solenoid .
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KUMAR PRAKASHAN-MAGNETIC EFFECTS OF ELECTRIC CURRENT -ANSWER THE FOLLOWING QUESTIONS IN VERY SHORT AS DIRECTED (MISCELLANEOUS):
  1. Give any two uses of an electromagnet .

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  2. A constant current I flows in a horizontal wire in the plane of paper...

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  3. How do you magnetisea piece of magnetic material ?

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  4. How does the current in a domestic circuit differ from that used to...

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  5. State what would happen to the direction of rotation of the cell curr...

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  6. State the use of Maxwell.s corckscrew rule .

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  7. What type of dynamo (a machine for changing other power into electric...

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  8. Give one reason for not using a series arrangement for domestic circ...

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  9. What does the following symbol indicate/represent?

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  10. What is the function of the brushes in an AC generator ?

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  11. What determined the frequency of AC produced by a generator ?

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  12. What is the role of each of the three pins in a power plug ?

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  13. State two serious hazards of electricity .

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  14. Name an instrument used in navigation.

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  15. What is the effect the resistance in the circuit at the time of short...

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  16. Name the current -carrying conductor , whose magnetic field is re...

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  17. What is a commutator ?

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  18. In an electric motor , which of the following remains fixed and w...

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  19. What change should be made in an AC generator , so that it may becom...

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  20. If fuses of 250 mA, 5A and 10 A were available , which one would be...

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