Explore topic-wise MCQs in Power Electronics.

This section includes 6 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:?$

A.
B.
Answer» B.
Discussion
2.

The load commutated chopper circuit consists of$

A. two thyristors and one commutating capacitor
B. four thyristors and one commutating capacitor
C. two thyristors and two commutating capacitors
D. four thyristors and two commutating capacitors
Answer» C. two thyristors and two commutating capacitors
Discussion
3.

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

A. 233 A
B. 59 A
C. 363 A
D. 198 A
Answer» D. 198 A
Discussion
4.

In current commutated copper circuit

A. the capacitor cannot charge on no load
B. the auxiliary thyristor is turned on automatically
C. the auxiliary thyristor is naturally commutated
D. the commutation is not reliable
Answer» D. the commutation is not reliable
Discussion
5.

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 μs. Calculate the value of inductance (L) required for the commutating circuit.$

A. 400 μH
B. 40 nH
C. 40 μH
D. 0.4 mH
Answer» D. 0.4 mH
Discussion
6.

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 μs. Calculate the value of capacitor (C) required for the commutating circuit.$

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