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Home ‣ Electronics ‣ Diodes and Applications Comments
  • Question

  • Typically the forward voltage on an LED is between _______ and ________.


  • Options
  • A. 1.5 V, 3.7 V
  • B. 0.7 V, 1.1 V
  • C. 1 V, 3 V
  • D. 1 V, 6 V

  • Correct Answer
  • 1 V, 3 V 

    • Diodes and Applications problems

    Search Results

    • 1. 
      A ___ is created when an electron moves from the valence band to the conduction band.

    • Options
    • A. hole
    • B. gap
    • C. vacancy
    • D. blank
      • Discuss
    • 2. A pure semiconductor material ___ very well.

    • Options
    • A. conducts
    • B. insulates
    • C. conducts and insulates
    • D. neither conducts nor insulates
      • Discuss
    • 3. The average value of the half-wave rectified output voltage is approximately __________ of Vp.

    • Options
    • A. 31.8%
    • B. 63.6%
    • C. 70.7%
    • D. 100%
      • Discuss
    • 4. The small amount of ac signal present on the output of a filtering network for a dc power supply is known as ________.

    • Options
    • A. pulsating dc
    • B. trickle
    • C. ripple
    • D. waffle
      • Discuss
    • 5. 

      The average value of the output voltage from the circuit in the given circuit equals ___.


    • Options
    • A. 5.48 V
    • B. 2.74 V
    • C. 0 V
    • D. 6.37 V
      • Discuss
    • 6. A two-diode rectifier will not operate without a _________.

    • Options
    • A. center-tapped transformer
    • B. voltage regulator
    • C. capacitive filter
    • D. phase-inverting transformer
      • Discuss
    • 7. 

      Connecting a capacitor filter to the circuit in the given circuit will___.


    • Options
    • A. produce a nearly-constant dc voltage
    • B. reduce the output voltage
    • C. increase the ripple voltage
    • D. lower the surge current
      • Discuss
    • 8. Special diodes designed to conduct in the reverse direction are called _______________ diodes.

    • Options
    • A. zener
    • B. varactor
    • C. LED
    • D. switching
      • Discuss
    • 9. 
      Atoms in a silicon crystal are held together by ___ bonds.

    • Options
    • A. crystal
    • B. chemical
    • C. electrical
    • D. covalent
      • Discuss
    • 10. ___ occurs when a pn junction is first formed.

    • Options
    • A. Recombination
    • B. Covalent bonding
    • C. Crystallization
    • D. Breakdown
      • Discuss

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