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Name the main component which changes an...

Name the main component which changes an a.c. generator into d.c. generator.

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Slip ring arrangement in an AC generator is replaced by split rings to make it a DC generator.
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MODERN PUBLICATION-ALTERNATING CURRENT -Revision Exercises ( Very short Annwer Qustion )
  1. What is the natural frequency of LC circuit ? What is the reactance of...

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  2. What is the energy stored in a pure LC circuit ?

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  3. Why connot we use a.c. for electrolysis?

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  4. sqrt(k//m) has dimennsions of which physical quantity?

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  5. What is a transformer ? On what principle the transformer is based ?

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  6. What is a step up transformer?

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  7. What is a step down transformer?

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  8. What is transformation ratio ?

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  9. What happens to the AC current in a transformer if alternating voltage...

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  10. What is the efficiency of a transformer ?

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  11. Why the core of a transformer is made up of a high permeability mater...

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  12. What is the average value of alternate voltage and current in a comple...

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  13. Why cannot a transformer be used to step up d.c. voltage ?

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  14. Name the main component which changes an a.c. generator into d.c. gene...

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  15. What is the instantaneous value of induced emf generated in the coil o...

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  16. What should be the value of sin omegat for induced emf to be maximum ?

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  17. What job do the brushes perform in an AC generator?

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  18. What is a choke coil ?

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  19. What is the resistance of an ideal choke coil ?

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  20. How much power is consumed in a purely inductive and a purely capaciti...

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