In phase-shift control method the control is carried out by varying the of grid voltage

Related Mcqs:

Ageing of a selenium rectifier may change the output voltage by__________?

A. 5 to 10 per cent B. 15 to 20 per cent C. 25 to 30 per cent D. none of the above...

Copper oxide rectifier is usually designed not to operate above___________?

A. 10°C B. 20°C C. 30°C D. 45°C...

If cathode and anode connections in a mercury arc rectifier are inter changed_____________?

A. the rectifier will not operate B. internal losses will be reduced C. both ion and electron streams will move in the same direction D. the rectifier will operate at reduced efficiency...

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...

Normally, which of the following is used, when a large-scale conversion from AC. to D.C. power is required ?

A. Motor-generator set B. Motor converter C. Rotary converter D. Mercury arc rectifier...