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
In a rotary converter armature currents are? Mark as favorite Copy Link d.c. only a.c. only partly a.c, and partly d.c. all of the above Check Answer
Which of the following A C. motors is usually used in large motor-generator· sets? Mark as favorite Copy Link Synchronous motor Squirrel cage induction motor Slip ring induction motor Any of the above Check Answer
Which of the following is reversible in action? Mark as favorite Copy Link Motor generator set Motor converter Rotary converter Any of the above Check Answer
It is the ….. of the transformer on which the magnitude of angle of overlap depends? Mark as favorite Copy Link resistance capacitance leakage reactance any of the above Check Answer
A rotary converter operates at a? Mark as favorite Copy Link low power factor high power factor zero power factor none of the above Check Answer
If cathode and anode connections in a mercury arc rectifier are inter changed? Mark as favorite Copy Link the rectifier will not operate internal losses will be reduced both ion and electron streams will move in the same direction the rectifier will operate at reduced efficiency Check Answer
In a rotary converter I2R losses as compared to a D.C. generator of the same size will be? Mark as favorite Copy Link same double less three times Check Answer
To produce cathode spot in a mercury arc rectifier? Mark as favorite Copy Link anode is heated tube is evacuated an auxiliary electrode is used low mercury vapour pressures are used Check Answer