Regulated DC Power Supply MCQ Questions & Answers

1

A Zener voltage regulator will cease to act as a voltage regulator if Zener current becomes ___________

A) Less than load current B) Zero C) More than load current D) None of the above

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Answer & Solution

Answer: Option B

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2

If the load resistance decreases in a Zener regulator, then Zener current ___________

A) Decreases B) Stays the same C) Increases D) None of the above

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Answer & Solution

Answer: Option A

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3

A Zener regulator ___________ in the power supply

A) Increases the ripple B) Decreases the ripple C) Neither increases nor decreases the ripple D) Data insufficient

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Answer & Solution

Answer: Option B

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4

Zener diode are generally made of ___________

A) Germanium B) Silicon C) Carbon D) None of the above

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Answer & Solution

Answer: Option B

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5

In an unregulated power supply, if load current increases, the output voltage ___________

A) Remains the same B) Decreases C) Increases D) None of the above

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Answer & Solution

Answer: Option B

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6

If the load current drawn by unregulated power supply increases, the d.c. output voltage ___________

A) Increases B) Decreases C) Stays the same D) None of the above

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Answer & Solution

Answer: Option B

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7

A 30 V Zener will have depletion layer width ___________ that of 10 V Zener

A) More than B) Less than C) Equal to D) None of the above

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Answer & Solution

Answer: Option A

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8

A Zener voltage regulator is used for ___________ load currents

A) High B) Very high C) Moderate D) Small

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Answer & Solution

Answer: Option D

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9

A Zener diode that has very narrow depletion layer will breakdown by mechanism

A) Avalanche B) Zener C) Both avalanche and Zener D) None of the above

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Answer & Solution

Answer: Option B

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10

In a Zener voltage regulator, the changes in load current produce changes in ___________

A) Zener current B) Zener voltage C) Zener voltage as well as Zener current D) None of the above

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Answer & Solution

Answer: Option A

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Regulated DC Power Supply MCQ Questions & Answers | Electrical Engineering