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

Related Mcqs:

In selenium rectifiers efficiencies ranging from _______ to _______ percent are attainable?

A. 25, 35 B. 40, 50 C. 60, 70 D. 75, 85...

Selenium rectifier can be operated at temperatures as high as____________?

A. 25°C B. 40°C C. 60°C D. 75°C...

When a rectifier is loaded which of the following voltage drops take place ?

A. Voltage drop in transformer reactance B. Voltage drop in resistance of transformer and smoothing chokes C. Arc voltage drop D. All of the above...

The voltage drop between the anode and cathode, of a mercury arc rectifier comprises of the following_____________?

A. anode drop and cathode drop B. anode drop and arc drop C. cathode drop and arc drop D. anode drop, cathode drop and arc drop...

A rotary converter operates at a______________?

A. low power factor B. high power factor C. zero power factor D. none of the above...