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.

A voltage commutated chopper has the following parameters:
Vs = 220 V. Commutation circuit: L = 20 H and C = 50 F.

A. nFind the effective on period for a constant load current of 80 A and Ton = 800 secs.
B. 1.075 s
C. 10.75 ms
D. 1075 s
E. 1.075 sec
Answer» D. 1075 s
Discussion
2.

A current commutated chopper is fed from a source of 230 V. Its commutating components are L = 20 H and C = 50 F. Find the value of peak commutating current.

A. 233 A
B. 59 A
C. 363 A
D. 198 A
Answer» D. 198 A
Discussion
3.

A voltage commutated chopper feeds power to an electric car (battery-powered). The battery voltage is 60 V. Starting current is 60 A and the SCR turn-off time is 20 s. Calculate the value of inductance (L) required for the commutating circuit.

A. 400 H
B. 40 nH
C. 40 H
D. 0.4 mH
Answer» D. 0.4 mH
Discussion
4.

A voltage commutated chopper feeds power to an electric car (battery-powered). The battery voltage is 60 V. The SCR turn-off time is 20 s. Calculate the value of capacitor (C) required for the commutating circuit.

A. 400 F
B. 40 nF
C. 40 F
D. 0.4 mF
Answer» D. 0.4 mF
Discussion