The efficiency of the copper oxide rectifier seldom exceeds____________?

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...

It is the_________of the transformer on which the magnitude of angle of overlap depends?

A. resistance B. capacitance C. leakage reactance D. any of the above...

In a mercury pool rectifier, the voltage drop across its electrodes___________?

A. is directly proportional to load B. is inversely proportional to load C. varies exponentially with the load current D. is almost independent of load current...

The cathdde voltage drop, in a mercury arc rectifier, is due to_____________?

A. expenditure of energy in ionization B. surface resistance C. expenditure of energy in overcoming the electrostatic field D. expenditure of energy in liberating electrons from the mercury...