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Floyd: MCQ in Special-Purpose Diodes

(Last Updated On: August 20, 2019)
MCQ for Special-Purpose Diodes

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.

View Answer:

Answer: Option C

Solution:

2. The normal operating region for a zener diode is the

A) forward-bias region.

B) reverse-bias region.

C) zero-crossing region.

D) reverse-breakdown region.

View Answer:

Answer: Option D

Solution:

3. Schottky diodes are also known as

A) PIN diodes.

B) hot carrier diodes.

C) step-recovery diodes.

D) tunnel diodes.

View Answer:

Answer: Option B

Solution:

4. A laser diode normally emits

A) coherent light.

B) monochromatic light.

C) coherent and monochromatic light.

D) neither coherent nor monochromatic light.

View Answer:

Answer: Option C

Solution:

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.

View Answer:

Answer: Option C

Solution:

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.

View Answer:

Answer: Option B

Solution:

7. Refer to Figure 3-1. If the load current increases, IR will ______ and IZ will ______.

MCQs in Special-Purpose Diodes Fig. 01

Figure 3-1

A) remain the same, increase

B) decrease, remain the same

C) increase, remain the same

D) remain the same, decrease

View Answer:

Answer: Option D

Solution:

8. Refer to Figure 3-1. If VIN attempts to increase, VR will

A) increase.

B) decrease.

C) remain the same.

D) none of the above

View Answer:

Answer: Option A

Solution:

9. Refer to Figure 3-1. If VIN increases, IZ will

A) increase.

B) decrease.

C) remain the same.

D) none of the above

View Answer:

Answer: Option A

Solution:

10. Refer to Figure 3-1. If VIN decreases, IR will

A) increase.

B) decrease.

C) remain the same.

d) none of the above

View Answer:

Answer: Option B

Solution:

11. Refer to Figure 3-2. Identify the Schottky diode.

MCQs in Special-Purpose Diodes Fig. 02

Figure 3-2

A) a

B) b

C) c

D) d

E) e

View Answer:

Answer: Option E

Solution:

12. Refer to Figure 3-2. Which symbol is correct for a zener diode?

A) a

B) b

C) c

D) d

E) e

View Answer:

Answer: Option B

Solution:

13. Refer to Figure 3-2. Find the tunnel diode symbol.

A) a

B) b

C) c

D) d

E) e

View Answer:

Answer: Option D

Solution:

14. Refer to Figure 3-2. Which symbol is correct for a photodiode?

A) a

B) b

C) c

D) d

E) e

View Answer:

Answer: Option C

Solution:

15. Refer to Figure 3-2. Which symbol is correct for an LED?

A) a

B) b

C) c

D) d

E) e

View Answer:

Answer: Option A

Solution:

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.

View Answer:

Answer: Option A

Solution:

17. The Schottky diode is used

A) in high-power circuits.

B) in circuits requiring negative resistance.

C) in very fast-switching circuits.

D) in power supply rectifiers.

View Answer:

Answer: Option C

Solution:

18. A tunnel diode is used

A) in high-power circuits.

B) in circuits requiring negative resistance.

C) in very fast-switching circuits.

D) in power supply rectifiers.

View Answer:

Answer: Option B

Solution:

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.

View Answer:

Answer: Option D

Solution:

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

View Answer:

Answer: Option B

Solution:

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

View Answer:

Answer: Option A

Solution:

22. What type of diode is commonly used in electronic tuners in TVs?

A) varactor

B) Schottky

C) LED

D) Gunn

View Answer:

Answer: Option A

Solution:

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

View Answer:

Answer: Option B

Solution:

24. LEDs are made out of

A) silicon.

B) germanium.

C) gallium.

D) silicon and germanium, but not gallium.

View Answer:

Answer: Option C

Solution:

25. What type of diode maintains a constant current?

A) LED

B) zener

C) current regulator

D) pin

E) none of the above

View Answer:

Answer: Option C

Solution:

26. What diode operates only with majority carriers?

A) laser

B) tunnel

C) Schottky

D) step-recovery

View Answer:

Answer: Option C

Solution:

27. What kind of diode is formed by joining a doped semiconductor region with a metal?

A) laser

B) tunnel

C) pin

D) Schottky

View Answer:

Answer: Option D

Solution:

28. Which diode employs graded doping?

A) zener

B) LED

C) tunnel

D) step-recovery

View Answer:

Answer: Option D

Solution:

29. What diode is used in seven-segment displays?

A) zener

B) LED

C) laser

D) Schottky

View Answer:

Answer: Option B

Solution:

30. Back-to-back varactor diodes are used for what reason?

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

View Answer:

Answer: Option C

Solution:

Check your work.

Complete List of Chapter Quiz in Floyd’s Electronic Devices

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