Computer Programming MCQs

5739 MCQs  (Page 106 of 574)

Practical way of obtaining static voltage equalization in series connected SCRs is by the use of____________?
A. One resistor across the string
B. Resistors of the same value across each scr
C. Resistors of different values across each scr
D. One resistor in series with each scr
Thyristor can be protected from over voltages by using____________?
A. Voltage clamping device.
B. Fuse.
C. Heat sink.
D. Snubber circuit.
The function of snubber circuit connected across the SCR is to___________?
A. Suppress dv / dt.
B. Increase dv / dt.
C. Decrease dv / dt.
D. Decrease di / dt.
In forward blocking mode of a thyristor________?
A. Junction j2 is in reverse bias and j1, j3 is in forward bias.
B. Junction j3 is in forward bias and j1, j2 is in reverse bias.
C. Junction j1, j3 is in reverse bias and j2 is in forward bias.
D. Junction j1 and j2 is in forward bias and j3 is in reverse bias.
In reverse blocking mode of a thyristor______?
A. Junction j2 is in reverse bias and j1, j3 is in forward bias.
B. Junction j3 is in forward bias and j1, j2 in reverse bias.
C. Junction j1, j3 is in reverse bias and j2 is in forward bias.
D. Junction j1 and j2 is in forward bias and j3 is in reverse bias.
Which statement is true for latching current ___________?
A.iT is related to turn off process of the device.
B. It is related to conduction process of device.
C. It is related to turn on process of the device.
D. Both c and d.