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Rectifiers and Converters - Interview Questions and Answers

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41. 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
Explanation:
42. 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
Explanation:
43. The applications of selenium rectifiers are usually limited to potential of
A. 10 V
B. 30 V
C. 60 V
D. 100 V
Explanation:
44. The ignited or auxiliary anode in mercury arc rectifier is made of
A. graphite
B. boron carbide
C. aluminum
D. copper
Explanation:
45. In which of the following appUcations, direct current is absolutely essential ?
A. Illumination
B. Electrolysis
C. Variable speed operation
D. Traction
Explanation:
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