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A capacitor behaves like a perfect condu...

A capacitor behaves like a perfect conductor for high frequency AC. Explain why.

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MODERN PUBLICATION-ALTERNATING CURRENT -Revision Exercises Short Answer Questions
  1. An inductor acts as a conductor for d.c. why ?

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  2. With the help of a phasor diagram find an expression for impedance (Z)...

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  3. A capacitor behaves like a perfect conductor for high frequency AC. Ex...

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  4. A Capacitor blocks d.c. and allows a.c. Why ?

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  5. When an ac source is connected to an ideal capacitor, show that the av...

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  6. Prove that an ideal capacitor in an a.c. circuit does not dissipate po...

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  7. Show that the current leads the voltage in phase by pi//2 in an AC cir...

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  8. What is a phasor ? What is the phase difference between current and vo...

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  9. Can a capacitor of suitable capacitance be use dto control a.c in plac...

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  10. Show that in the free oscillations of an LC circuit, the sum of energi...

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  11. A bulb connected in series with a solenoid is lit by a.c. source, Fig....

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  12. How will the inductive reactance and capacitive reactance change on do...

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  13. Can the voltage drop across the inductor or capacitro in a series LCR ...

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  14. What do you mean by impedance of LCR series circuit ? Derive an expres...

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  15. Why does a capacitor block DC whereas an inductor allows DC to pass th...

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  16. (i) An a.c. Source of voltage V = V(0) " sin " omegat is connected...

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  17. In an LCR series combination R= 400 Omega L =100 mH and C = 1 muF . ...

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  18. Give three elements X, Y and Z to be connected across an ac source . W...

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  19. A capacitor C a variable resistor R and a bulb B are connected in seri...

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  20. Why is the use of AC voltage preferred over DC voltage ? Give two reas...

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