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Capacitors problems

  • 1. A capacitor is constructed of two parallel:

  • Options
  • A. conductors
  • B. semiconductors
  • C. inductors
  • D. dielectrics
    • Discuss
  • 2. Electronics Capacitors: What is the re

    What is the reactive power in the given circuit?


  • Options
  • A. 0 VAR
  • B. 691 µVAR
  • C. 44.23 mVAR
  • D. 1.45 kVAR
    • Discuss
  • 3. A capacitor's rate of charge is considered:

  • Options
  • A. magnetic
  • B. a current block
  • C. linear
  • D. exponential
    • Discuss
  • 4. If a current of 40 mA flows through a series circuit consisting of a 0.4 µF capacitor and a resistor in series with a 4 kHz, 40 Vac source, what is the total circuit impedance?

  • Options
  • A. 10 Ω
  • B. 100 Ω
  • C. 1 k Ω
  • D. 1 M Ω
    • 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. Electronics Capacitors: What is the cap

    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
  • 7. 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
  • 8. 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
  • 9. What is the dielectric constant for ceramic?

  • Options
  • A. between 6 and 8000
  • B. 5.0
  • C. between 5 and 1000
  • D. 3000
    • Discuss
  • 10. 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
    • Discuss

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