Special-Purpose Diodes - General Questions

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Special-Purpose Diodes - General Questions

1. 

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

Answer: Option B

Explanation:

No answer description available for this question

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2. 

A laser diode normally emits
A. coherent light.
B. monochromatic light.
C. coherent and monochromatic light.
D. neither coherent nor monochromatic light.

Answer: Option C

Explanation:

No answer description available for this question.
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3. 

What type of diode is commonly used in electronic tuners in TVs?
A. varactor
B. Schottky
C. LED
D. Gunn

Answer: Option A

Explanation:

No answer description available for this question

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4. 

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.

Answer: Option B

Explanation:

No answer description available for this question

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5. 

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

Answer: Option C

Explanation:

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6. 

Zener diodes with breakdown voltages greater than 5 V operate predominantly in what type of breakdown?
A. avalanche
B. zener
C. varactor
D. Schottky

Answer: Option A

Explanation:

No answer description available for this question

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7. 

Refer to this figure. If VIN decreases, IR will

mcq3_1007_1 (3)
A. increase.
B. decrease.
C. remain the same.

Answer: Option B

Explanation:

No answer description available for this question.

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8. 

What diode is used in seven-segment displays?
A. zener
B. LED
C. laser
D. Schottky

Answer: Option B

Explanation:

No answer description available for this question

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