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What is an electromagnet?upon what facto...

What is an electromagnet?upon what factors its strength depends?

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MBD -HARYANA BOARD-MAGNETIC EFFECTS OF ELECTRIC CURRENT-EXAMPLE
  1. What is the function of an earth wire? Why is it necessary to earth me...

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  2. In case of a solenoid, the strength of magnetic field depends upon

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  3. What is an electromagnet?upon what factors its strength depends?

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  4. The circulating induced current produced in a metal plate due to the c...

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  5. What do you understand by magnetic effect of current? To understand th...

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  6. What is magnetic field? Give important properties of magnetic field li...

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  7. Which rule is shown in the figure?Define the rule in which device this...

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  8. In the figure which law is shown?lablel 1 and 2 in relation to the law...

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  9. Name the law shown in the figure lable 1 and 2 according to this law.

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  10. In the alongside figure a straight conductor B is carrying current in ...

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  11. In the alongside figure a straight conductor B is carrying current in ...

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  12. What is electro-magnetic induction?

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  13. List some such electric applicances in which electric motor is used.

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  14. What is electric fuse?What is its imnportant?

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  15. Why the fuse wire should have high resistance and low metling point?

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  16. What is meant by over-loading?

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  17. When does an electric short-circuit occur?

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  18. What are hazards of electricity?

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  19. A dynamo

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  20. On what principle is a.c.motor based?

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