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Explain briefly, how the pehnomenon of r...

Explain briefly, how the pehnomenon of resonance in the circuit can be used in the tuning mechanism of a radio or a TV set.

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MODERN PUBLICATION-ALTERNATING CURRENTS-EXERCISE
  1. Why does an LC circuit produce oscillations?

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  2. Why does an LC circuit produce oscillations?

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  3. Explain briefly, how the pehnomenon of resonance in the circuit can be...

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  4. In an a.c. circuit, why is there no power consumption for an ideal ind...

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  5. Prove mathematically that the average power over a complete cycle of a...

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  6. Prove that in an a.c. circuit, an ideal capacitor does nt dissipate po...

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  7. The instantaneous current and voltage in an a.c. circuit given by I = ...

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  8. What do you mean by power factor? On what factors does it depend?

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  9. Explain the importance of power factor.

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  10. For circuit used for transporting electric power, a low power factor i...

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  11. Why power factor correction is must in heavy machinery?

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  12. Power factor can often be improved by the use of capacitor of appropri...

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  13. Which is more dangerous in use a.c. or d.c.? Explain, why?

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  14. Why 200 V a.c. more dangerous than 220 V d.c.?

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  15. Why 200 V a.c. more dangerous than 220 V d.c.?

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  16. Why is the use of A.C. voltage preferred over D.C. voltage? Give two r...

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  17. The circuit arrangement given in the figure shows that when an ac. pas...

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  18. The circuit arrangement given in the figure shows that when an ac. pas...

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  19. In India domestic power supply is at 220 V, 50Hz. While in USA it is 1...

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  20. What are the factors which reduce the efficiency of a transformer ?

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