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What is the idle component or wattless c...

What is the idle component or wattless component of AC ?

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`I_(v) sin delta` .
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MODERN PUBLICATION-ALTERNATING CURRENT -Revision Exercises ( Very short Annwer Qustion )
  1. The power factor of an AC circuit is 0.5 . What will be the phase diff...

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  2. Define the term 'wattles current'.

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  3. What is the idle component or wattless component of AC ?

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  4. Why inductors or capacitors are used in AC circuits for controlling cu...

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  5. What are undamped and damped oscillations ?

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  6. What are undamped and damped oscillations ?

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  7. What is the dimensional formula of sqrt(LC) ?

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  8. What is the natural frequency of LC circuit ? What is the reactance of...

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

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

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

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

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  13. What is a step up transformer?

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  14. What is a step down transformer?

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  15. What is transformation ratio ?

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

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  17. What is the efficiency of a transformer ?

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

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

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

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