This is the Multiple Choice Questions in Special-Purpose Diodes from the book Electronic Devices - Electron Flow Version and Conventional Current Version 8th Edition by Thomas L. Floyd. If you are looking for a reviewer in Electronics Engineering this will definitely help. I can assure you that this will be a great help in reviewing the book in preparation for your Board Exam. Make sure to familiarize each and every questions to increase the chance of passing the ECE Board Exam.
Online Questions and Answers Topic Outline
- MCQs in The Zener Diode
- MCQs in Zener Diode Applications
- MCQs in The Varactor Diode
- MCQs in Optical Diodes
- MCQs in Other Types of Diodes
- MCQs in GreenTech Application 3: Solar Power
Practice Exam Test Quesions
Choose the letter of the best answer in each questions.
1. The process of emitting photons from a semiconductive material is called
- A) photoluminescence.
- B) gallium arsenide.
- C) electroluminescence.
- D) gallium phosphide.
- A) forward-bias region.
- B) reverse-bias region.
- C) zero-crossing region.
- D) reverse-breakdown region.
- A) PIN diodes.
- B) hot carrier diodes.
- C) step-recovery diodes.
- D) tunnel diodes.
- A) coherent light.
- B) monochromatic light.
- C) coherent and monochromatic light.
- D) neither coherent nor monochromatic light.
5. An 8.2 V zener has a resistance of 5 Ω. The actual voltage across its terminals when the current is 25 mA is
- A) 8.2 V.
- B) 125 mV.
- C) 8.325 V.
- D) 8.075 V.
6. A 6.2 V zener is rated at 1 watt. The maximum safe current the zener can carry is
- A) 1.61 A.
- B) 161 mA.
- C) 16.1 mA.
- D) 1.61 mA.
7. Refer to Figure 3-1. If the load current increases, IR will _____ and IZ will _____.
Figure 3-1
- A) remain the same, increase
- B) decrease, remain the same
- C) increase, remain the same
- D) remain the same, decrease
- A) increase.
- B) decrease.
- C) remain the same.
- A) increase.
- B) decrease.
- C) remain the same.
- A) increase.
- B) decrease.
- C) remain the same.
Figure 3-2
- A) a
- B) b
- C) c
- D) d
- E) e
- A) a
- B) b
- C) c
- D) d
- E) e
- A) a
- B) b
- C) c
- D) d
- E) e
- A) a
- B) b
- C) c
- D) d
- E) e
- A) a
- B) b
- C) c
- D) d
- E) e
16. An LED is forward-biased. The diode should be on, but no light is showing. A possible trouble might be
- A) the diode is open.
- B) the series resistor is too small.
- C) none. The diode should be off if forward-biased.
- D) the power supply voltage is too high.
- A) in high-power circuits.
- B) in circuits requiring negative resistance.
- C) in very fast-switching circuits.
- D) in power supply rectifiers.
- A) in high-power circuits.
- B) in circuits requiring negative resistance.
- C) in very fast-switching circuits.
- D) in power supply rectifiers.
19. You have an application for a diode to be used in a tuning circuit. A type of diode to use might be
- A) an LED.
- B) a Schottky diode.
- C) a Gunn diode.
- D) a varactor.
20. Zener diodes with breakdown voltages less than 5 V operate predominantly in what type of breakdown?
- A) avalanche
- B) zener
- C) varactor
- D) Schottky
21. Zener diodes with breakdown voltages greater than 5 V operate predominantly in what type of breakdown?
- A) avalanche
- B) zener
- C) varactor
- D) Schottky
- A) varactor
- B) Schottky
- C) LED
- D) Gunn
23. A varactor is a pn junction diode that always operates in _____-bias and is doped to _____ the inherent capacitance of the depletion region.
- A) forward, maximize
- B) reverse, maximize
- C) reverse, minimize
- D) forward, minimize
- A) silicon.
- B) germanium.
- C) gallium.
- D) silicon and germanium, but not gallium.
- A) LED
- B) zener
- C) current regulator
- D) pin
- E) none of the above
- A) laser
- B) tunnel
- C) Schottky
- D) step-recovery
27. What kind of diode is formed by joining a doped semiconductor region with a metal?
- A) laser
- B) tunnel
- C) pin
- D) Schottky
- A) zener
- B) LED
- C) tunnel
- D) step-recovery
- A) zener
- B) LED
- C) laser
- D) Schottky
- A) over-voltage protection
- B) a wider tuning range
- C) to eliminate harmonic distortion
- D) no reason; only zeners are used in a back-to-back configuration
Check your work.
Complete List of Chapter Quiz in Floyd's Electronic Devices
credit: © 2014 www.PinoyBIX.org
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