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  • Question

  • When is a capacitor fully charged?


  • Options
  • A. when the voltage across its plates is When is a capacitor fully charged? when the voltage across its plates is of the voltage from ground of the voltage from ground to one of its plates
  • B. when the current through the capacitor is the same as when the capacitor is discharged
  • C. when the voltage across the plates is 0.707 of the input voltage
  • D. when the current through the capacitor is directly proportional to the area of the plates

  • Correct Answer
  • when the current through the capacitor is the same as when the capacitor is discharged 

    • Capacitors problems

    Search Results

    • 1. What is the impedance of an ac RC parallel circuit if the resistance is 12 ohms and the capacitive reactance equals 5 ohms?

    • Options
    • A. 0.2 ohms
    • B. 3.5 ohms
    • C. 4.6 ohms
    • D. 13 ohms
      • Discuss
    • 2. What will a 1 µF capacitor store?

    • Options
    • A. one coulomb of charge
    • B. 6.24 x 1012 electrons
    • C. one volt
    • D. one µA of current
      • Discuss
    • 3. What is the impedance of a series RC circuit that consists of a 0.22 µF capacitor and a 200-ohm resistor connected to a 3 kHz source?

    • Options
    • A. 214 ohms
    • B. 313 ohms
    • C. 414 ohms
    • D. 880 ohms
      • Discuss
    • 4. A capacitor has 25 V across its plates and a stored charge of 1500 µC. What is the capacitance value?

    • Options
    • A. 60 pF
    • B. 60 µF
    • C. 16.67 mF
    • D. 37.5 mF
      • Discuss
    • 5. Capacitor value markings are usually:

    • Options
    • A. alphanumeric
    • B. color dabs
    • C. standard
    • D. white print
      • Discuss
    • 6. The quantity that represents an ideal capacitor dissipating 0 W of power is

    • Options
    • A. instantaneous power
    • B. true power
    • C. reactive power
    • D. resistive power
      • Discuss
    • 7. What is this circuit?


    • Options
    • A. bandpass filter
    • B. high-pass filter
    • C. low-pass filter
    • D. differentiator
      • Discuss
    • 8. If the dielectric constant of a capacitor is decreased, then its capacitance will:

    • Options
    • A. increase
    • B. decrease
    • C. remain the same
    • D. be destroyed
      • Discuss
    • 9. In an ac circuit, a capacitor and an output 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
    • 10. In an RC circuit, true power (PR) equals:

    • Options
    • A.
    • B. VS × I
    • C. I2R
    • D. VT × RT
      • Discuss

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