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  • Question

  • If the reactive power of a circuit is 50 mW while the apparent power is 64 mW, then what is the true power of the circuit?


  • Options
  • A. 14 mW
  • B. 36 mW
  • C. 40 mW
  • D. 114 mW

  • Correct Answer
  • 40 mW 

    • Capacitors problems

    Search Results

    • 1. What is the dielectric constant for ceramic?

    • Options
    • A. between 6 and 8000
    • B. 5.0
    • C. between 5 and 1000
    • D. 3000
      • Discuss
    • 2. In a 20 Vac series RC circuit, if 20 V is measured across the resistor and 40 V is measured across the capacitor, the applied voltage is:

    • Options
    • A. 45 V
    • B. 50 V
    • C. 55 V
    • D. 60 V
      • Discuss
    • 3. In an ac circuit, an output capacitor and a resistor are connected in series with an ac signal. What filter action will be the result?

    • Options
    • A. bandpass
    • B. low-pass
    • C. high-pass
    • D. band-stop
      • Discuss
    • 4. 

      What is the capacitance of the circuit shown in the given circuit?


    • Options
    • A. 0.066 µF
    • B. 0.9 µF
    • C. 65.97 pF
    • D. 900 pF
      • Discuss
    • 5. You could increase the time constant of an RC circuit by

    • Options
    • A. adding a resistor in parallel with the circuit resistance
    • B. adding a capacitor in parallel with the circuit capacitance
    • C. increasing the amplitude of the input voltage
    • D. exchanging the position of the resistor and capacitor in the circuit
      • Discuss
    • 6. What is the total current for a 5 MHz, 1 Vac circuit that consists of a 27 pF capacitor and a 1 kΩ resistor connected in parallel?

    • Options
    • A. 459 µA
    • B. 647 µA
    • C. 1.31 mA
    • D. 1.85 mA
      • Discuss
    • 7. What is the voltage across the capacitor?


    • Options
    • A. 7.07 V
    • B. 1.11 V
    • C. 111 mV
    • D. 7.07 mV
      • Discuss
    • 8. As a capacitor is being charged, the voltage across its terminals will:

    • Options
    • A. increase
    • B. decrease
    • C. remain the same
    • D. oppose the source
      • Discuss
    • 9. What is the reactance value for a capacitor installed in a dc circuit?

    • Options
    • A. zero
    • B. moderate
    • C. infinite
    • D. cannot tell
      • Discuss
    • 10. What is the total capacitance?


    • Options
    • A. 1 F
    • B. 12 F
    • C. 0.615 F
    • D. 8 F
      • Discuss

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