Tuesday, July 26, 2011

Part -2 (Electricity Based Experiments :: Viva)

  1. What is Ac?

  2. WHat is DC?

  3. Distinguish unidirectional current and direct current.

  4. Define RMS value of AC.

  5. What do you mean by frequency of AC?

  6. Why the power supply to our houses are AC and not DC?

  7. What are the advantages of AC over DC?

  8. What is a choke coil?

  9. WHy a choke coil is considered better than a resistor to regulate AC?

  10. What is an electromagnet?

  11. What is resonance?

  12. What is the use of sound box in a sonometer?

  13. Why can't we use a transformer in dc circuits?

  14. WHy ac transmitted to long distance are at very high voltages?

  15. What is electromagnetic induction?

  16. State Faraday's laws of electromagnetic induction.

  17. Why Michael Faraday is called the father of electricity though he was not the one who discovered electricity?

  18. What is damping?

  19. What are eddy currents?

  20. State Lenz law.

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