Explore topic-wise MCQs in Power Electronics.

This section includes 5 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_VOLTAGE_CONTROLLER,_USING_ONE_SCR_IN_ANTI_PARALLEL_WITH_A_DIODE,_FEEDS_A_LOAD_R_AND_VS_=_230_V._FOR_A_FIRING_ANGEL_OF_90¬¨ àû_FOR_THE_SCR,_THE_PMMC_VOLTAGE_CONNECTED_ACROSS_R_WOULD_READ?$#

A. 0
B. 51.8 V
C. –51.8 V
D. –36.82 V
Answer» D. ‚Äö√Ñ√∂‚àö√ë‚àö¬®36.82 V
Discussion
2.

HIGH_FREQUENCY_GATING_USES_A?$

A. train of pulses
B. continuous gating block
C. carrier signal
D. none of the above
Answer» B. continuous gating block
Discussion
3.

In continues gatin?

A. overlap angle is very high
B. SCR is heated up
C. size of the pulse transformer is small
D. commutation cannot be achieved effectively
Answer» C. size of the pulse transformer is small
Discussion
4.

Pulse gating is suitable for

A. R loads only
B. R and RL loads
C. RL loads only
D. all types of loads
Answer» B. R and RL loads
Discussion
5.

A single phase voltage controller has input of 230 V and a load of 15 Ω resistive. For 6 cycles on and 4 cycles off, determine the rms output voltage.$

A. 189 V
B. 260 V
C. 156 V
D. 178 V
Answer» E.
Discussion