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A capacitor of unknown value and an indu...

A capacitor of unknown value and an inductor of 0.1H and a resistor of `10Omega`are connectedin series to a 220V, 50Hz ac source. It is foundthat the power factor of circuit is unity.Calculate the capacitance of capacitor and maximum amplitude of current

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PUNJAB BOARD PREVIOUS YEAR PAPERS-ALTERNATING CURRENTS-EXERSICE
  1. A 230 V variable frequency source is connected across a series combina...

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  2. A series circuit with L = 0.12H, C = 0.48 mF and R = 25 ohm, is connec...

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  3. A capacitor of unknown value and an inductor of 0.1H and a resistor of...

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  4. A 60muF capacitor, a 0.3H inductor and a 50Omega resistor are connecte...

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  5. A series LCR circuit with R = 20Omega (Ohm), L = 1,5H (Henry) and C= 3...

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  6. What is the relation between peak value and root mean square value of ...

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  7. What is the phase relationship between current and voltage in an induc...

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  8. What do you mean by power factor of an a.c. circuit ?

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  9. Define inductive reactance of an inductor.

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  10. What is Wattless current ?

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  11. Define capacitive reactance of a capacitor.

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  12. What is an idle current ?

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  13. Define impedance of an a.c. circuit.

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  14. What is the impedance of a circuit ?

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  15. What is impedance of circuit at resonance ?

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  16. For a circuit at resonance, voltage applied is E = E@ sin wt and curre...

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  17. For a circuit at resonance, voltage applied is E = E@ sin wt and curre...

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  18. Define resonant frequency of LCR series circuit.

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

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  20. Define root mean square value of an alternating current.

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