Power Electronics MCQs Quiz Multiple Choice Questions & Answers


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Power Electronics multiple choice questions and answers on Power Electronics MCQ questions quiz on Power Electronics objective questions.

Power Electronics Questions with Answers

1. A crowbar is a circuit which is used to protect a

2. A diac has........................terminals

3. A diac has....................pn junctions

4. A diac has ................... semiconductor layers

5. A diac is simply.....................

6. A diac is turned on by ...................

7. A full wave rectifier with resistive load produces

8. A triac can pass a portion of ..................... half-cycle through the load

9. A triac has .................... semiconductor layers

10. A Triac has three terminals viz.....................

11. A triac is a ................ switch

12. A triac is equivalent to two SCRs .......................

13. A UJT has ....................

14. A UJT is sometimes called................ diode

15. AC power in a load can be controlled by using

16. After peak point, the UJT operates in the ................... region

17. An SCR can be used

18. An SCR is made up of silicon because

19. Between the incoming and outgoing devices in voltage commutation

20. Between the peak point and the valley point of UJT emitter characteristics we have ....................... region

21. Double fourier series analysis of PWM is

22. During the commutation period in 3 phase converter, overlap time is

23. For a buck converter to reduce the conduction losses in diode

24. For bidirectional operation of converters

25. For similar carrier and modulating signals, the line current used in CSI is

26. For sweptfrequency measurements, the input impedance of the mismatched transmission line would vary with frequency as the electrical length ofthe transmission line would

27. Harmonics in 3 phase inverters can be reduced by using

28. In a 3 phaseCSI, if the required line output voltages are balanced and 120 degreeout of phase, then the chopping angles are used to eliminate only theharmonics at frequencies

29. In a load commutated DC - DC chopper, the capacitor has a

30. In a three phase converter, the number of notches per cycle is

31. In a UJT, the p-type emitter is ........................ doped

32. In bipolar modulation, the carrier is symmetric about zero with amplitude equal to Cm, the PWM output

33. In current commutated DC - DC choppers, the voltage spike appears across the load when

34. In EMCsignal, the source delivers maximum power to the input of transmissionline when the transmission line input impedance

35. In radiative coupling, the emitter radiation field

36. In single phase VSI, the harmonic which is not present is

37. LISN is a device used to measure conducted emissions. LISN stands for

38. Power electronics essentially deals with control of a.c. power at .....................

39. Silicon controlled rectifier can be turned on

40. Single phase VSI are mainly used in

41. The advantage of using free - wheeling diode in half controlled bridge converter is that

42. The conduction losses in IGBT is

43. The device that does not have the gate terminal is ............................

44. The device that exhibits negative resistance region is .........................

45. The effects of EMI can be reduced by

46. The input current waveform of a bridge controlled rectifier when the load is perfectly filtered is

47. The most suited gate pulses given to the AC regulator with R - L load can be in the form of

48. The normal way to turn on a diac is by ...........................

49. The output power of the cascaded amplifier-attenuator system can be determined using

50. The power MOSFET device is a

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