In a glass bulb mercury arc rectifier the maximum current rating is restricted to___________?
In a glass bulb mercury arc rectifier the maximum current rating is restricted to___________? A. 2000 A B. 1500 A C. 1000 AD. 500 A
In a glass bulb mercury arc rectifier the maximum current rating is restricted to___________? A. 2000 A B. 1500 A C. 1000 AD. 500 A
In a mercury arc rectifier characteristic blue luminosity is due to_____________? A. colour of mercuryB. ionization C. high temperature D. electron streams
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 dropD. All of the above
Which of the following mercury arc rectifier will deliver least undulating current? A. Six-phase B. Three-phase C. Two-phase D. Single-phase
In a three-phase mercury arc rectifiers each anode conducts for____________? A. one-third of a cycle B. one-fourth of a cycle C. one-half a cycle D. two-third of a cycle
In a mercury arc rectifier________ flow from anode to cathode A. ions B. electrons C. ions and electrons D. any of the above
A mercury arc rectifier possesses __________ regulation characteristics A. straight line B. curved line C. exponentialD. none of the above
In a grid control of mercury arc rectifiers when the grid is made positive relative to cathode, then it the electrons on their may to anode. A. accelerates B. decelerates C. any of the above D. none of the above
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.…
It is the_________of the transformer on which the magnitude of angle of overlap depends? A. resistance B. capacitanceC. leakage reactance D. any of the above