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Home Electrical Engineering Capacitors Comments

  • Question
  • In Question 6, the capacitor will reach full charge in a time equal to approximately


  • Options
  • A. 6 RC
  • B. 5 RC
  • C. RC
  • D. none of the above

  • Correct Answer
  • 5 RC 


  • Capacitors problems


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    • 1. A capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased

    • Options
    • A. VR > VC
    • B. VC > VR
    • C. VR = VC
    • D. VR and VC = 0
    • Discuss
    • 2. When the voltage across a capacitor is tripled, the stored charge

    • Options
    • A. triples
    • B. is cut to one-third
    • C. stays the same
    • D. doubles
    • Discuss
    • 3. Which of the following capacitors is polarized?

    • Options
    • A. mica
    • B. ceramic
    • C. plastic-film
    • D. electrolytic
    • Discuss
    • 4. A 10 µF, 20 µF, 22 µF, and 100 µF capacitor are in parallel. The total capacitance is

    • Options
    • A. 2.43 µF
    • B. 4.86 µF
    • C. 100 µF
    • D. 152 µF
    • Discuss
    • 5. A 12 kHz voltage is applied to a 0.33 µF capacitor, and 200 mA of rms current is measured. What is the value of the voltage?

    • Options
    • A. 8 V
    • B. 80 V
    • C. 80 mV
    • D. 800 mV
    • Discuss
    • 6. A 0.47 µF capacitor is across a 2 kHz sine wave signal source. The capacitive reactance is

    • Options
    • A. 170 Ω
    • B. 17 Ω
    • C. 0.000169 Ω
    • D. 1.7 Ω
    • Discuss
    • 7. A capacitor of 0.02 µF is larger than

    • Options
    • A. 0.000020 F
    • B. 200,000 pF
    • C. 2,000 pF
    • D. all of the above
    • Discuss
    • 8. A 330 pF capacitor and a 220 pF capacitor are each connected across a 6 V dc source. The voltage across the 330 pF capacitor is

    • Options
    • A. 3 V
    • B. 6 V
    • C. 4 V
    • D. 0 V
    • Discuss
    • 9. A capacitor of 2,000 pF is greater than

    • Options
    • A. 0.02 µF
    • B. 0.002 µF
    • C. 0.0002 µF
    • D. 0.0000002 F
    • Discuss
    • 10. In a certain loaded transformer, the secondary voltage is one-fourth the primary voltage. The secondary current is

    • Options
    • A. one-fourth the primary current
    • B. four times the primary current
    • C. equal to the primary current
    • D. one-fourth the primary current and equal to the primary current
    • Discuss


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