Which of the following methods may be used to convert A.C. system to D.C ?

Related Mcqs:

Which of the following rectifiers are primarily used for charging of low voltage batteries from AC supply ?

A. Mechanical rectifiers B. Copper oxide rectifiers C. Selenium rectifiers D. Electrolytic rectifiers E. Mercury arc rectifiers...

Copper oxide rectifier is usually designed not to operate above___________?

A. 10°C B. 20°C C. 30°C D. 45°C...

On which of the following factors the number of phases for which a rectifier should be designed depend ?

A. The voltage regulation of the rec¬tifier should be low B. In the output circuit there should be no harmonics C. The power factor of the system should be high D. The rectifier supply transformer should be utilized to the best ad-vantage E. all of the above...

To produce cathode spot in a mercury arc rectifier______________?

A. anode is heated B. tube is evacuated C. an auxiliary electrode is used D. low mercury vapour pressures are used...

A rotary converter is a single machine with______________?

A. one armature and one field B. two armatures and one field C. one armature and two fields D. none of the above...