Explore topic-wise MCQs in Power Electronics.

This section includes 4 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 single-phase modulation of PWM inverters, the pulse width is 120 . For an input voltage of 220 V dc, the rms value of output voltage is

A. 185 V
B. 254 V
C. 127 V
D. 179 V
Answer» E.
Discussion
2.

In case of sinusoidal pulse width modulation with MI < 1, if the number of pulses per half cycle (N) = 6, then

A. harmonics of order 7 and 9 become significant
B. harmonics of order 7 and 9 are eliminated
C. harmonics of order 11 and 13 become significant
D. harmonics of order 11 and 13 are eliminated
Answer» D. harmonics of order 11 and 13 are eliminated
Discussion
3.

In case of sinusoidal pulse width modulation with MI < 1, the order of the dominate harmonic can be raised by

A. increasing the number of pulses
B. reducing the number of pulses
C. lowering the input voltage frequency
D. raising the input voltage frequency
Answer» B. reducing the number of pulses
Discussion
4.

In case of sinusoidal pulse width modulation with MI < 1, if the number of pulses per half cycle (N) = 5, then

A. harmonics of order 5 and 7 become significant
B. harmonics of order 5 and 7 are eliminated
C. harmonics of order 9 and 11 become significant
D. harmonics of order 9 and 11 are eliminated
Answer» D. harmonics of order 9 and 11 are eliminated
Discussion