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Name some devices in which electric moto...

Name some devices in which electric motors are used.

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MODERN PUBLICATION-MAGNETIC EFFECTS OF ELECTRIC CURRENT-EXERCISE
  1. Name some devices in which electric motors are used.

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  2. Write the S.I. unit of magnetic field vecB.

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  3. With the help of which rule can you find the direction o magneitc fiel...

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  4. An electric motor converts one form of energy to another .Name these f...

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  5. What is the principle of an electric motor?

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  6. What is a compass needle?

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  7. what happens to the strength of magnetic field if currnt flowing in th...

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  8. Whenever there is a relative motion between a coil and a magnet ,and i...

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  9. The device used for producing electric current is called,

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  10. Switch is connected to which wire-live neutral or earth?

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  11. What is the colour of neutral wire in a domestic electric circuit?

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  12. In an electric circuit... is always connected in parallel

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  13. Which of the two circuits 5 ampere or 15 ampere requires a thin fuse w...

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  14. Does current prefers to move in a high or low resistence path?

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  15. What is the composition of the alloy of which the electric fuse is mad...

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  16. What is the frequency of household supply of a.c. in India?

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  17. Lodestone(Fe3O4) has enormous application because it is a strong magne...

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  18. Unlike poles repel each other. Is this statement true.

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  19. The magnetic field lines

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  20. Magnetic field lines are discontinuous curves. Is this statement true.

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  21. Why two magnetic lines of forces never intersect each other?

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