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  • Question

  • What is the reactance value for a capacitor installed in a dc circuit?


  • Options
  • A. zero
  • B. moderate
  • C. infinite
  • D. cannot tell

  • Correct Answer
  • infinite 

    • Capacitors problems

    Search Results

    • 1. 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
    • 2. What is the voltage across the capacitor?


    • Options
    • A. 7.07 V
    • B. 1.11 V
    • C. 111 mV
    • D. 7.07 mV
      • Discuss
    • 3. 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
    • 4. 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
    • 5. What is the dielectric constant for ceramic?

    • Options
    • A. between 6 and 8000
    • B. 5.0
    • C. between 5 and 1000
    • D. 3000
      • Discuss
    • 6. What is the total capacitance?


    • Options
    • A. 1 F
    • B. 12 F
    • C. 0.615 F
    • D. 8 F
      • Discuss
    • 7. Which material has the highest dielectric strength?

    • Options
    • A. Air
    • B. Paper
    • C. Mica
    • D. Oil
      • Discuss
    • 8. Most older types of paper capacitors have been replaced by which type of construction?

    • Options
    • A. electrolytic
    • B. plastic film
    • C. oxide casing
    • D. waxed paper
      • Discuss
    • 9. What is the impedance of this circuit?


    • Options
    • A. 5928 Ω
    • B. 2000 Ω
    • C. 1902 Ω
    • D. 1798 Ω
      • Discuss
    • 10. 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

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