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Power Electronics MCQ Questions & Answers

Power Electronics MCQs : This section focuses on the "Basics" of Power Electronics. These Multiple Choice Questions (MCQs) should be practiced to improve the Power Electronics skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

Power Electronics refers to the?

A. process of controlling the flow of current
B. process of controlling the flow of voltage
C. Both A and B
D. None of the above

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Question 2

The most desirable power electronic system is one whose efficiency and reliability is ?

A. 0.25
B. 0.5
C. 0.75
D. 1

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Question 3

A power electronic system converts electrical energy from one form to another.

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

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Question 4

Applications of Power Electronics are classified into _________ types.

A. 1
B. 2
C. 3
D. 4

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Question 5

Which of the following utilizes moving and/or rotating mechanical parts?

A. Static Applications
B. Drive Applications
C. Simple Applications
D. All of the above

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Question 6

SMPS is used for?

A. obtaining controlled ac power supply
B. obtaining controlled dc power supply
C. storage of dc power
D. switch from one source to another

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Question 7

HVDC transmission lines are __________ as compared to HVAC lines.

A. difficult to erect
B. more expensive for long distances
C. more expensive for long distances
D. less expensive for short distances

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Question 8

For high power applications _________ are used as static switches whereas for low power applications __________ are used.

A. Transistors, SCRs
B. SCRs, transistors
C. Diodes, transistors
D. SCRs, diodes

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Question 9

The negative polarity is used in the monopolar link because it

A. uses less conductor size
B. is safer
C. has less resistance
D. produces less radio interference

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Question 10

Drive applications have rotating parts such as motors.

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

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