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  • Question

  • What is the power factor if the apparent power of a circuit is 5 W, while the true power is 4 W?


  • Options
  • A. 0.0 W
  • B. 0.8 W
  • C. 1.0 W
  • D. 1.25 W

  • Correct Answer
  • 0.8 W 

    • Capacitors problems

    Search Results

    • 1. After a capacitor has charged for 1 tc, what percentage of current remains in the resistor?

    • Options
    • A. 63.2
    • B. 36.8
    • C. 13.5
    • D. 5.0
      • Discuss
    • 2. What is the angle theta value for a 5.6 µF capacitor and a 50-ohm resistor in series with a 1.1 kHz, 5 Vac source?

    • Options
    • A. 27.3 degrees
    • B. 62.7 degrees
    • C. ?27.3 degrees
    • D. ?62.7 degrees
      • Discuss
    • 3. For a given charge difference, electrostatic field strength varies according to:

    • Options
    • A. plate differential
    • B. plate area
    • C. plate distance
    • D. dielectric quantity
      • Discuss
    • 4. How is ac current related to ac voltage in a purely capacitive circuit?

    • Options
    • A. AC current is 0.707 of the ac voltage.
    • B. AC current lags ac voltage.
    • C. AC current is 0.637 of the ac voltage.
    • D. AC current leads ac voltage.
      • Discuss
    • 5. What is the impedance of this circuit?


    • Options
    • A. 5928 Ω
    • B. 2000 Ω
    • C. 1902 Ω
    • D. 1798 Ω
      • Discuss
    • 6. What is the reactive power?


    • Options
    • A. 6.8 mW
    • B. 9.8 mW
    • C. 12.8 mW
    • D. 15.8 mW
      • Discuss
    • 7. What is the circuit's total current?


    • Options
    • A. 4.57 mA
    • B. 9.327 mA
    • C. 11.570 mA
    • D. 13.830 mA
      • Discuss
    • 8. Capacitor value markings are usually:

    • Options
    • A. alphanumeric
    • B. color dabs
    • C. standard
    • D. white print
      • Discuss
    • 9. A capacitor has 25 V across its plates and a stored charge of 1500 µC. What is the capacitance value?

    • Options
    • A. 60 pF
    • B. 60 µF
    • C. 16.67 mF
    • D. 37.5 mF
      • Discuss
    • 10. What is the impedance of a series RC circuit that consists of a 0.22 µF capacitor and a 200-ohm resistor connected to a 3 kHz source?

    • Options
    • A. 214 ohms
    • B. 313 ohms
    • C. 414 ohms
    • D. 880 ohms
      • Discuss

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