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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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PRADEEP-MAGNETIC EFFECTS OF ELECTRIC CURRENT-Short Answer Questions (Additional)
  1. State two ways by which the strength of an electromagnet can be increa...

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  2. State three factors on which the magnitude of the force on a current-c...

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

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  4. A DC motor is rotating in clockwise direction. How can the direction o...

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  5. State two ways by which the speed of rotation of an electric motor can...

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  6. (a) What is a natural magnet? (b) What is an artificial magnet?

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  7. (a) What is the nature of the magnetic field inside a solenoid? (b)...

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  8. (a) Which force is independent of the state of rest or of motion of a ...

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  9. (a) How does the magnetic field (B) due to a straight conductor vary w...

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  10. (a) Name a material of which permanent magnets are made? (b) Which o...

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  11. What are the two main systems of wiring commonly used in household cir...

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  12. Explain the significance of the following in a house circuiting. (i) k...

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  13. State the principle of an AC generator. What determines the frequency ...

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  14. What is a switch and how is it connected?

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

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  16. State two serious hazards of electricity.

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  17. What the two main precautions to be taken while using an electric supp...

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  18. What is the role of magnetism in medical science?

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  19. (a) What type of energy changes into electrical energy in electromagne...

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  20. (a) Which polarity is developed on the face of the solenoid when a nor...

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