Explore topic-wise MCQs in Power Electronics.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Power Electronics knowledge and support exam preparation. Choose a topic below to get started.

1.

In a single-phase half wave inverter ________ SCR(s) are/is gated at a time.

A. one
B. two
C. three
D. none of the mentioned
Answer» B. two
Discussion
2.

What is the voltage across the R load when only T1 is conducting?

A. Vs
B. Vs/2
C. 2Vs
D. zero
Answer» C. 2Vs
Discussion
3.

Single phase half bridge inverters requires

A. two wire ac supply
B. two wire dc supply
C. three wire ac supply
D. three wire dc supply
Answer» E.
Discussion
4.

__________ based inverters do not require self-commutation.

A. IGBT
B. GTO
C. PMOSFET
D. SCR
Answer» E.
Discussion
5.

VSIs using IGBTs are turned off by

A. load commutation
B. line commutation
C. applying a negative gate pulse
D. removing the base signal
Answer» E.
Discussion
6.

VSIs using GTOs are turned off by

A. load commutation
B. line commutation
C. applying a negative gate pulse
D. removing the base signal
Answer» D. removing the base signal
Discussion
7.

In a VSI (Voltage source inverter)

A. the internal impedance of the DC source is negligible
B. the internal impedance of the DC source is very very high
C. the internal impedance of the AC source is negligible
D. the IGBTs are fired at 0 degrees.
Answer» B. the internal impedance of the DC source is very very high
Discussion
8.

Line-commutated inverters have

A. AC on the supply side and DC on the load side
B. AC on both supply and load side
C. DC on both supply and load side
D. DC on the supply side and AC on the load side
Answer» C. DC on both supply and load side
Discussion
9.

Inverters converts

A. dc power to dc power
B. dc power to ac power
C. ac power to ac power
D. ac power to dc power
Answer» C. ac power to ac power
Discussion