The power factor of a circuit is equal to




D. R/Z

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  1. The ___ of an alternating quantity is defined as the fractional part of a period or cycle through which…
  2. If the inductance is decreaseda the impedance of the circuit containing a resistor a capacitor and an…
  3. The average value of a triangular or sawtooth wave is _____ times its peak value.
  4. The potential gradient in a cable is maximum in
  5. In an ac circuit with a resistive branch and an inductive branch in parallela the
  6. The admittance of a parallel RLC circuit is found to be the ___ sum of conductance and susceptances.
  7. The symbol Q refers to
  8. Which of the statements below is not true?
  9. What is the form factor of a triangular wave?
  10. Which of the following is a common material used in wire-wound resistors?
  11. The ratio between the active power and the apparent power of a load in an ac circuit is called
  12. A law which states that when a constant electromotive force is applied to a circuit consisting of a…
  13. What increases the resistance of wire at high frequencies?
  14. The open-circuit voltage at the terminal of load RL is 60V. Under the condition of maximum power transfera…
  15. What is the value of a carbon composition resistor with the following color code: Browna whitea orangea…
  16. Transient period is considered over after
  17. A circuit whose parameters change with voltage or current.
  18. A capacitor opposes change in
  19. What is the reading of an ohmmeter for a shorted capacitor?
  20. Liquids that are good conductors because of ionization are called
  21. A gang capacitor is a variable capacitor in which capacitance is varied by changing the
  22. When voltage is applied across a ceramic dielectric the electrostatic field p roduced is 50 times greater…
  23. Which factor does not affect resistance?
  24. A 0.09 microfarad capacitor is charged to 220 volts. How long in milliseconds will it discharged resistor…
  25. How many coulombs are delivered by a storage battery in 25 hours if it is supplying current at the rate…
  26. If a coil has a Q of 10a it means that
  27. The rms value of a triangular or sawtooth waveform is ___ tim value.
  28. Which of the following is the peakiest?
  29. If voltage across the plates of 2 F capacitor is increased by 4 Va then charge on the plates will
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    When two pure sine waves of the same frequency and the same amplitude which are exactly 180 outof-phase are added togethera the result is