Explore topic-wise MCQs in Power Electronics.

This section includes 10 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.

A single phase half bridge inverter has load R = 2 Ω and a dc voltage source Vs/2 = 115 V. Find the power delivered to the load due to the fundamental component.

A. 536 kW
B. 53.61 kW
C. 5.361 kW
D. 536 W
Answer» D. 536 W
Discussion
2.

A single phase half bridge inverter has load R = 2 Ω and a dc voltage source Vs/2 = 115 V. Find the rms value of the fundamental load current.

A. 10.25 A
B. 51.7 A
C. 86 A
D. 24.8 A
Answer» C. 86 A
Discussion
3.

A single phase half bridge inverter has a dc voltage source Vs/2 = 115 V. Find the rms value of the fundamental component of output voltage.

A. 510 V
B. 103.5 V
C. 120 V
D. 96 V
Answer» C. 120 V
Discussion
4.

The fundamental component of output voltage for a full wave bridge inverter is given by

A. (2Vs/π) sinωt
B. (4Vs/π) sinωt
C. (Vs/2π) sinωt
D. (Vs)
Answer» C. (Vs/2π) sinωt
Discussion
5.

The fundamental component of output voltage for a half wave bridge inverter is given by

A. (4Vs/π) sinωt
B. (2Vs/π) sinωt
C. (Vs/2π) sinωt
D. (Vs)
Answer» C. (Vs/2π) sinωt
Discussion
6.

For a half wave bridge inverter, the output voltage

A. Vo = – Vs/2 for 0 < t < T/2
B. Vo = – Vs/2 for T/2< t<T
C. Vo = – Vs for 0 < t < T/2
D. Vo = Vs/2 for T/2< t < T
Answer» C. Vo = – Vs for 0 < t < T/2
Discussion
7.

For a full wave bridge inverter, the output voltage (Vo)

A. Vo = Vs/2 for 0 < t < T/2
B. Vo = Vs for 0 < t <T/2
C. Vo = Vs for T/2< t < T
D. Vo = -Vs for T/2< t < 3T/2
Answer» C. Vo = Vs for T/2< t < T
Discussion
8.

In the following circuit, the diodes D1 to D4 are used to

A. reduce the switching losses
B. send current back to the dc source when SCRs are off
C. send current back to the load when SCRs are off
D. send current back to the dc source when SCRs are conducting
Answer» C. send current back to the load when SCRs are off
Discussion
9.

In a single phase full wave bridge inverter, when the output is Vs or –Vs

A. one SCR and one diode are conducting
B. four SCRs are conducting
C. two SCRs are conducting
D. two diodes are conducting
Answer» D. two diodes are conducting
Discussion
10.

The output voltage from a single phase full wave bridge inverter varies from

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