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Capacitors problems

  • 1. A capacitor stores energy within a dielectric between the conducting plates in the form of:

  • Options
  • A. a magnetic field
  • B. positive voltage
  • C. negative voltage
  • D. an electric field
    • Discuss
  • 2. A source voltage across a capacitor will:

  • Options
  • A. lead the current by 90 degrees
  • B. lead the current by 180 degrees
  • C. lag the current by 90 degrees
  • D. lag the current by 180 degrees
    • Discuss
  • 3. With a 500 kHz signal source, what would be the value of a capacitor yielding a capacitive reactance of 1 k Ω?

  • Options
  • A. 318 pF
  • B. 2 nF
  • C. 3.18 µF
  • D. 2 F
    • Discuss
  • 4. What is the circuit's impedance?

    Electronics Capacitors: What is the circuit's impedance?

  • Options
  • A. 1192 Ω
  • B. 843 Ω
  • C. 723 Ω
  • D. 511 Ω
    • Discuss
  • 5. If a charged capacitor is disconnected from a circuit, it will:

  • Options
  • A. immediately discharge
  • B. recharge
  • C. remain charged
  • D. leak the charge
    • Discuss
  • 6. Electronics Capacitors: How long would

    How long would it take the capacitor in the given circuit to completely discharge if the switch was in position 2?


  • Options
  • A. 22 ms
  • B. 69 ms
  • C. 345 ms
  • D. 420 ms
    • Discuss
  • 7. What is wrong with a leaky capacitor?

  • Options
  • A. It is open.
  • B. It is shorted.
  • C. The dielectric resistance has increased.
  • D. The dielectric resistance has decreased.
    • Discuss
  • 8. A resistor and an output capacitor form a series circuit with a square wave applied. The circuit is:

  • Options
  • A. an integrator
  • B. a differentiator
  • C. a multiplier
  • D. a divider
    • Discuss
  • 9. What do variable capacitors use for dielectric?

  • Options
  • A. ceramic, electrolytic, mica, or paper
  • B. air, ceramic, mica, or plastic
  • C. ceramic, paper, plastic, or mica
  • D. mica, ceramic, plastic, or electrolytic
    • Discuss
  • 10. What is the dc charging/discharging time constant for the circuit?

    Electronics Capacitors: What is the dc charging/discharging time constant for the circuit?

  • Options
  • A. 294 ps
  • B. 13.5 ms
  • C. 21.25 ms
  • D. 2.16 Gs
    • Discuss

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