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  • Question

  • If a capacitor is placed across a 20 V source, what will be the amount of charge after 5 tc?


  • Options
  • A. 5.0 V
  • B. 12.8 V
  • C. 13.5 V
  • D. 20 V

  • Correct Answer
  • 20 V 

    • Capacitors problems

    Search Results

    • 1. A practical capacitor

    • Options
    • A. is a short to dc
    • B. looks like a capacitor in parallel with a resistor
    • C. is an open to ac
    • D. stores energy in a magnetic field
      • Discuss
    • 2. What is the value of a capacitor labeled 102?

    • Options
    • A. 10,000 pF
    • B. 1000 pF
    • C. 1000 µF
    • D. 10,000 µF
      • Discuss
    • 3. As a capacitor is being charged, current flowing into the capacitor will:

    • Options
    • A. increase
    • B. decrease
    • C. remain the same
    • D. cannot tell
      • Discuss
    • 4. An 8 V power source is charging a capacitor. How many volts will be across the capacitor at the second time constant?

    • Options
    • A. 1 volt
    • B. 3 volts
    • C. 5 volts
    • D. 7 volts
      • Discuss
    • 5. Which of the following determines the capacitance of a capacitor?

    • Options
    • A. Plate area, dielectric strength, and plate separation
    • B. Voltage rating, dielectric constant, and temperature coefficient
    • C. Temperature coefficient, plate area, and plate separation
    • D. Plate area, dielectric constant, and plate separation
      • Discuss
    • 6. What is the phase shift between the voltage across the resistor and the voltage from the source?


    • Options
    • A. VR leads VS by 17°
    • B. VR leads VS by 73°
    • C. VR lags VS by 73°
    • D. VR lags VS by 17°
      • Discuss
    • 7. Which of the following is the reference vector for parallel RC circuits?

    • Options
    • A. R
    • B. I
    • C. C
    • D. V
      • Discuss
    • 8. Select the equation below that represents the relationship between charge, capacitance, and voltage for a capacitor.

    • Options
    • A. Q = CV
    • B. C = QV
    • C.
    • D. V = IR
      • Discuss
    • 9. What circuit has the following frequency response?


    • Options
    • A. bandpass filter
    • B. high-pass filter
    • C. low-pass filter
    • D. integrator
      • Discuss
    • 10. What is the capacitive reactance if I = 1 amp, V = 2 volts, C = 5 F, and frequency = 10 Hz?

    • Options
    • A. 0.2 Ω
    • B. 0.5 Ω
    • C. 0.02 Ω
    • D. 0.003 Ω
      • Discuss

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