The free wheeling diode is not required in ___ rectifier ?
A. Uncontrolled
B. Controlled
C. Both a and b
D. None
Rectifiers and Converters
What is the full form of RFI ?
A. Radio Frequency Interrupt
B. Receiver Frequency Interference
C. Radio Frequency Interference
D. None of the above
The power delivery and efficiency is low in ______ phase rectifier ?
A. Single
B. Three
C. Seven
D. None
The additional filters are required in _____ phase filter ?
A. Single
B. Three
C. Both a and b
D. None of them
The transformer utilization factor is less in _____ phase rectifier.
A. Single
B. Three
C. Both a and b
D. None
The input is a ______ wire supply in single phase rectifier ?
A. Four
B. Five
C. Three
D. Two
In a rotary converter armature currents are ____.
A. partly a.c. and partly d.c.
B. a.c. only
C. d.c. only
D. None of them
In a mercury arc rectifier____ flow from anode to cathode.
A. ions and electrons
B. ions
C. electrons
D. any of the above
In which of the following appUcations, direct current is absolutely essential?
A. Variable speed operation
B. Traction
C. Electrolysis
D. Illumination
The ionization potential of mercury is approximately ____.
A. 16.4 V
B. 10.4 V
C. 5.4 V
D. 8.4 V