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Floyd Self-test in Special-Purpose Diodes

(Last Updated On: December 8, 2017)

Floyd Self-test in Chapter 3 of Electronic Devices

This is the Self-test in Chapter 3: Special-Purpose Diodes from the book Electronic Devices Conventional Current Version, 9th edition by Thomas L. Floyd. If you are looking for a reviewer in Electronics Engineering this will definitely help you before taking the Board Exam.

Floyd Self-test Chapter 3 Topic Outline

  • Floyd Self-test in The Zener Diode
  • Floyd Self-test in Zener Diode Applications
  • Floyd Self-test in The Varactor Diode
  • Floyd Self-test in Optical Diodes
  • Floyd Self-test in Other Types of Diodes

Stat Practice Exam Test Questions

Choose the letter of the best answer in each questions.

1. The cathode of a zener diode in a voltage regulator is normally

  • (a) more positive than the anode
  • (b) more negative than the anode
  • (c) at +0.7 V
  • (d) grounded

2. If a certain zener diode has a zener voltage of 3.6 V, it operates in

  • (a) regulated breakdown
  • (b) zener breakdown
  • (c) forward conduction
  • (d) avalanche breakdown

3. For a certain 12 V zener diode, 10mA change in zener current produces a 0.1 V change in zener voltage. The zener impedance for this current range is

  • (a) 1Ω
  • (b) 100Ω
  • (c) 10Ω
  • (d) 0.1Ω

4. The datasheet for particular zener gives Vz = 10V at Iz = 500 mA. Zz for these condition is

  • (a) 50 Ω
  • (b) 20 Ω
  • (c) 10 Ω
  • (d) unknown

5. A no-load condition means that

  • (a) the load has infinite resistance
  • (b) the load has zero resistance
  • (c) the output terminals are open
  • (d) answers(a) and (c)

6. A varactor diode exhibits

  • (a) a variable capacitance that depends on reverse voltage
  • (b) a variable resistance that depends on reverse voltage
  • (c) a variable capacitance that depends on forward current
  • (d) a constant capacitance over a range of reverse voltages

7. An LED

  • (a) emits light when reverse-biased
  • (b) senses light when reverse-biased
  • (c) emits light when forward-biased
  • (d) acts as a variable resistance

8. Compared to a visible red LED, an infrared LED

  • (a) produces light with shorter wavelengths
  • (b) produces light of all wavelengths
  • (c) produces only one color of light
  • (d) produces light with longer wavelengths

9. Compared to incandescent bulbs, high-intensity LEDs

  • (a) are brighter
  • (b) have a much longer life
  • (c) use less power
  • (d) all of the above

10. An OLED differs from a conventional LED in that it

  • (a) requires no bias voltage
  • (b) as layers of organic material in the place of a pn junction
  • (c) can be implemented using an inkjet printing process
  • (d) both (b) and (c)

11. An infrared LED is optically coupled to a photodiode. When the LED is turned off, the reading on an ammeter in series with the reverse-biased photodiode will

  • (a) not change
  • (b) decrease
  • (c) increase
  • (d) fluctuate

12. The internal resistance of a photodiode

  • (a) increases with light intensity when reverse-biased
  • (b) decreases with light intensity when reverse-biased
  • (c) increases with light intensity when forward-biased
  • (d) decreases with light intensity when forward-biased

13. A laser diode produces

  • (a) incoherent light
  • (b) coherent light
  • (c) monochromatic light
  • (d) both (b) and (c)

14. A diode that has a negative resistance characteristic is the

  • (a) Schottky diode
  • (b) tunnel diode
  • (c) laser diode
  • (d) hot-carrier diode

15. In order for a system to function properly, the various types of circuits that make up the system must be

  • (a) properly biased
  • (b) properly connected
  • (c) properly interfaced
  • (d) all of the above
  • (e) answers(a) and (b)

Complete List of Floyd Self-test in Electronic Devices

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