Power Electronics – MCQs

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1. : What is the main function of a power electronic converter?



2. : Which device is commonly used in power electronics for switching applications?



3. : The full form of SCR is:



4. : Which one of these is a unidirectional device?



5. : A TRIAC can conduct current in:



6. : What is the typical application of a chopper in power electronics?



7. : Inverters convert:



8. : The operation of a power MOSFET is based on:



9. : Which device combines the advantages of BJT and MOSFET?



10. : What is the main drawback of SCR in switching circuits?



11. : The firing angle of an SCR is defined as:



12. : Which converter converts AC of one frequency to AC of another frequency?



13. : In a full-wave rectifier, the number of diodes used is:



14. : The advantage of using IGBT over MOSFET is:



15. : A snubber circuit is used in power electronics to:



16. : Which of the following is an uncontrolled device?



17. : Which material is commonly used for high-power semiconductor devices?



18. : The term “commutation” in SCRs refers to:



19. : A buck converter is used to:



20. : The main drawback of a linear voltage regulator is:



21. : The basic component of a PWM-based inverter is:



22. : A boost converter increases:



23. : In a three-phase inverter, the number of switching devices required is:



24. : Which power electronic device is suitable for fast switching applications?



25. : The efficiency of power electronic devices is generally:



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