Electrical Engineering : Rectifiers And Converters QUESTIONS AND ANSWERS :: part1 : 1 to 5
Following Electrical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
1.With a motor converter it is possible to obtain D.C. voltage only upto |
| 200-100 V |
| 600�800 V |
| 1000�1200 V |
| 1700�2000 V |
2.In a mercury arc rectifier positive ions are attracted towards |
| anode |
| cathode |
| shell bottom |
| mercury pool |
3.To produce cathode spot in a mercury arc rectifier |
| anode is heated |
| tube is evacuated |
| an auxiliary electrode is used |
| low mercury vapour pressures are used |
4.If cathode and anode connections in a mercury arc rectifier are inter changed |
| the rectifier will not operate |
| internal losses will be reduced |
| both ion and electron streams will move in the same direction |
| the rectifier will operate at reduced efficiency |
5.In which of the following appUcations, direct current is absolutely essential ? |
| Illumination |
| Electrolysis |
| Variable speed operation |
| Traction |
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