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Home ‣ Electronics ‣ Capacitors See What Others Are Saying!
  • Question

  • Which of the following statements is true?


  • Options
  • A. The voltage to which a capacitor is charged can change instantaneously.
  • B. The current in a capacitive circuit takes time to change.
  • C. A fully charged capacitor appears as a short to dc current.
  • D. An uncharged capacitor appears as a short to an instantaneous change in current.

  • Correct Answer
  • An uncharged capacitor appears as a short to an instantaneous change in current. 

    • More questions

    • 1. The total resistance is 35 Ω.


    • Options
    • A. True
    • B. False
      • Discuss
    • 2. In a series RL circuit, a power factor of 0.5 results in less energy conversion to heat than does a power factor of 0.6.

    • Options
    • A. True
    • B. False
      • Discuss
    • 3. A(n) _____ can be rapidly switched on and off remotely by another controlling circuit.

    • Options
    • A. triac
    • B. diac
    • C. RTD
    • D. zero-voltage switch
      • Discuss
    • 4. Power supplies are regulated to prevent the output voltage from changing due to changes in the

    • Options
    • A. line voltage
    • B. supply load
    • C. frequency
    • D. both line voltage and supply load
      • Discuss
    • 5. The gate-source junction of a JFET must be ________ for proper linear operation.

    • Options
    • A. forward-biased
    • B. reverse-biased
    • C. either forward-biased or reverse-biased
    • D. neutral
      • Discuss
    • 6. 

      In the given circuit, what type of failure will cause the voltage at point B to equal the voltage at point C?


    • Options
    • A. R1 shorts
    • B. R2 shorts
    • C. R3 shorts
    • D. R2 opens
      • Discuss
    • 7. The total power in a parallel circuit equals the sum of the individual branch powers.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. One of the most common applications of a potentiometer is as an adjustable voltage divider, also known as

    • Options
    • A. voltage control
    • B. current control
    • C. volume control
    • D. divider control
      • Discuss
    • 9. If three resistors of 1.5 kilohms, 470 ohms, and 3300 ohms are in series with a 25-volt source, what is the total circuit current?

    • Options
    • A. 210 mA
    • B. 5.2 mA
    • C. 4.7 mA
    • D. .007 A
      • Discuss
    • 10. 
      While putting three 1.5 V batteries into a flashlight, you put one in backwards. The flashlight will be ______________.

    • Options
    • A. brighter than normal
    • B. dimmer than normal
    • C. off
    • D. the same
      • Discuss

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