In a three-phase mercury arc rectifiers each anode conducts for? Mark as favorite Copy Link one-third of a cycle one-fourth of a cycle one-half a cycle two-third of a cycle Check Answer
The internal efficiency of a mercury arc rectifier depends on? Mark as favorite Copy Link voltage only current only voltage and current r.m.s. value of current Check Answer
Glass rectifiers are usually made into units capable of D.C. output (maximum continuous rating) of? Mark as favorite Copy Link 100 A at 100 V 200 A at 200 V 300 A at 300 V 500 A at 500 V Check Answer
A rotary converter in general construction and design, is more or less like? Mark as favorite Copy Link a transformer an induction motor an alternator any dc machine Check Answer
A rotary converter combines the function of? Mark as favorite Copy Link an induction motor and a D.C. generator a synchronous motor and a DC generator a D.C. series motor and a D.C. generator none of the above Check Answer
In selenium rectifiers efficiencies ranging from to percent are attainable? Mark as favorite Copy Link 25, 35 40, 50 60, 70 75, 85 Check Answer
The efficiency of an electrolytic rectifier is nearly? Mark as favorite Copy Link 80% 70% 60% 40% Check Answer
In a glass bulb mercury arc rectifier the maximum current rating is restricted to? Mark as favorite Copy Link 2000 A 1500 A 1000 A 500 A Check Answer
The ionization potential of mercury is approximately? Mark as favorite Copy Link 5.4 V 10.4 V 8.4 V 16.4 V Check Answer
With a motor converter it is possible to obtain DC voltage only upto? Mark as favorite Copy Link 200-400 V 600-800 V 1000-1200 V 1700-2000 V Check Answer