Power Semiconductor Devices MCQs

Practice Power Semiconductor Devices MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Power ElectronicsPower Semiconductor Devices

Which device is commonly used as a controlled switch in power-electronic circuits?

ASCR
BLDR
CZener diode only
DPhotodiode

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Correct Answer: A. SCR

Explanation: An SCR is a thyristor widely used as a controlled switching device in power-electronic converters.

Reference: Power electronics fundamentals

Question 2

Power ElectronicsPower Semiconductor Devices

An ideal power semiconductor switch in the ON state should have?

AZero voltage drop
BInfinite voltage drop
CZero current capability
DInfinite switching loss

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Correct Answer: A. Zero voltage drop

Explanation: An ideal closed switch conducts current with zero voltage across it, so its conduction loss is zero.

Reference: Standard power electronics: power semiconductor devices

Question 3

Power ElectronicsPower Semiconductor Devices

An ideal power semiconductor switch in the OFF state should have?

AZero current
BMaximum current
CZero blocking voltage
DInfinite conduction loss

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Correct Answer: A. Zero current

Explanation: An ideal open switch blocks voltage while carrying zero current.

Reference: Standard power electronics: power semiconductor devices