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What is the role of the split-ring in an...

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

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Draw a labelled diagram of an electric motor. Explain its principle and working. What is the function of a split-ring in an electric motor?

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LAKHMIR SINGH & MANJIT KAUR-MAGNETIC EFFECT OF ELECTRIC CURRENT -Exercise
  1. Of what substance are the brushes of an electric motor made ?

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  2. In an electric motor, which of the following remains fixed and which r...

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

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  4. Fill in the following blanks with suitable words : (a) Fleming's Rul...

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  5. (a) A current-carrying conductor is placed perpendicularly in a magnet...

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  6. State Fleming's left-hand rule.

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  7. What is the principle of an electric motor ? Name some of the devices ...

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  8. (a) In a d.c. motor, why must the current to the coil be reversed twic...

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  9. (a) State what would happen to the direction of rotation of a motor if...

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  10. (a) What is an electric motor ? With the help of a labelled diagram, d...

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  11. In an electric motor, the direction of current in the coil changes onc...

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  12. An electron beam enters a magnetic field right angles to it as shown i...

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  13. The force experienced by a current-carrying wire placed in a magnetic ...

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  14. The force experienced by a current-carrying wire placed in a magnetic ...

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  15. A current flows in a wire running between the S and N poles of a magne...

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  16. A electric motor is a device which transforms :

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  17. A magnetic field exerts no force on

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  18. A horizontal wire carries a current as shown as shown in Figure below ...

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  19. If the current in a wire is flowing in the vertically downward directi...

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  20. Which way does the wire in the diagram below tend to move ?

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