Explore topic-wise MCQs in Power Electronics.

This section includes 18 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.

Determine the distortion factor (μ) for a full bridge inverter with supply Vs = 60 V.

A. 0.8
B. 0.7
C. 0.9
D. 1
Answer» D. 1
Discussion
2.

A single phase full bridge inverter using transistors and diodes is feeding a R load of 3 Ω with the dc input voltage of 60 V. Find the fundamental frequency output power.

A. 1200 W
B. 856 W
C. 972 W
D. 760 W
Answer» D. 760 W
Discussion
3.

A single phase full bridge inverter using transistors and diodes is feeding a R load of 3 Ω with the dc input voltage of 60 V. Find the rms output voltage and the peak reverse blocking voltage of each transistor.

A. 30 V, 60 V
B. 30 V, 30 V
C. 60 V, 60 V
D. 60 V, 30 V
Answer» D. 60 V, 30 V
Discussion
4.

Find the distortion factor (μ), for a single phase half wave bridge inverter with dc source Vs = 1 kV.

A. 0.87
B. 1
C. 0.9
D. 0.7
Answer» D. 0.7
Discussion
5.

A single-phase half bridge inverter is connected to a 230 V dc source which is feeding a R load of 10 Ω. Determine the average current through each SCR inverter switch.

A. 11.5 A
B. 5.75 A
C. 23 A
D. none of the mentioned
Answer» C. 23 A
Discussion
6.

A single-phase half bridge inverter is connected to a 230 V dc source which is feeding a R load of 10 Ω. Determine the fundamental power delivered to the load.

A. 1.07 W
B. 107.2 W
C. 1.07 kW
D. 107.2 kW
Answer» D. 107.2 kW
Discussion
7.

The distortion factor (μ) is the ratio of

A. total rms output voltage to fundamental rms output voltage
B. fundamental rms output voltage to fundamental average output voltage
C. total rms output voltage to rms value of all the harmonic components
D. fundamental rms output voltage to total rms output voltage
Answer» E.
Discussion
8.

If Vr is the rms value of the inverter output voltage and V1 is the rms value of the fundamental component, then the total harmonic distortion (THD) is given by

A. Vr/V1
B. (Vr + V1r
C. [ (Vr/V1)2 – 1 ]1/2
D. [ (Vr/V1)1/2 + 1 ]2
Answer» D. [ (Vr/V1)1/2 + 1 ]2
Discussion
9.

A_SINGLE_PHASE_FULL_BRIDGE_INVERTER_USING_TRANSISTORS_AND_DIODES_IS_FEEDING_A_R_LOAD_OF_3_‚ÄÖ√Ñ√∂‚ÀÖ√´¬¨‚ÀÇ_WITH_THE_DC_INPUT_VOLTAGE_OF_60_V._FIND_THE_FUNDAMENTAL_FREQUENCY_OUTPUT_POWER.?$#

A. 1200 W
B. 856 W
C. 972 W
D. 760 W
Answer» D. 760 W
Discussion
10.

Determine_the_distortion_factor_(μ)_for_a_full_bridge_inverter_with_supply_Vs_=_60_V.$#

A. 0.8
B. 0.7
C. 0.9
D. 1
Answer» D. 1
Discussion
11.

A single phase full bridge inverter using transistors and diodes is feeding a R load of 3 Ω with the dc input voltage of 60 V. Find the rms output voltage and the peak reverse blocking voltage of each transistor?#

A. 30 V, 60 V
B. 30 V, 30 V
C. 60 V, 60 V
D. 60 V, 30 V
Answer» D. 60 V, 30 V
Discussion
12.

What would be the harmonic factor of lowest order harmonic in case of a half wave bridge inverter?

A. 1/1
B. 1/3
C. 1/2
D. Insufficient data
Answer» C. 1/2
Discussion
13.

A single phase inverter gives rms value of output voltage as 115 V and the fundamental output voltage of as 103.5 V. Find the THD (Total Harmonic Distortion).

A. 0.4 %
B. 40.8 %
C. 48.3 %
D. 4.83 %
Answer» D. 4.83 %
Discussion
14.

Find the distortion factor (μ), for a single phase half wave bridge inverter with dc source Vs = 1 kV.$

A. 0.87
B. 1
C. 0.9
D. 0.7
Answer» D. 0.7
Discussion
15.

A single-phase half bridge inverter is connected to a 230 V dc source which is feeding a R load of 10 Ω. Determine the average current through each SCR inverter switch.$

A. 11.5 A
B. 5.75 A
C. 23 A
D. none of the mentioned
Answer» C. 23 A
Discussion
16.

A single-phase half bridge inverter is connected to a 230 V dc source which is feeding a R load of 10 Ω. Determine the fundamental power delivered to the load.$

A. 1.07 W
B. 107.2 W
C. 1.07 kW
D. 107.2 kW
Answer» D. 107.2 kW
Discussion
17.

The distortion factor (μ) is the ratio of$

A. total rms output voltage to fundamental rms output voltage
B. fundamental rms output voltage to fundamental average output voltage
C. total rms output voltage to rms value of all the harmonic components
D. fundamental rms output voltage to total rms output voltage
Answer» E.
Discussion
18.

If Vr is the rms value of the inverter output voltage and V1 is the rms value of the fundamental component, then the total harmonic distortion (THD) is given by

A. V<sub>r</sub>/V<sub>1</sub>
B. (V<sub>r</sub> + V<sub>1r</sub>
C. [ (V<sub>r</sub>/V<sub>1</sub>)<sup>2</sup> – 1 ]<sup>1/2</sup>
D. [ (V<sub>r</sub>/V<sub>1</sub>)<sup>1/2</sup> + 1 ]<sup>2</sup>
Answer» D. [ (V<sub>r</sub>/V<sub>1</sub>)<sup>1/2</sup> + 1 ]<sup>2</sup>
Discussion