The typical time of rising time lies between______________?
The typical time of rising time lies between______________?
A. 10 – 20 µs
B. 40 – 60 µs
C. 1 – 4 µs
D. 90 – 100 µs
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Advantages of HVDC transmission over AC system is / are____________?
Advantages of HVDC transmission over AC system is / are____________?a. Reversal of power can be controlled by firing angle
b. Very good dynamic behavior
c. They can link two AC system operating unsynchronized
d. All of theseAC power in a load can be controlled by using_____________?
AC power in a load can be controlled by using_____________?A. two SCR’s in parallel opposition
B. two SCR’s in series
C. three SCR’s in series
D. four SCR’s in seriesAfter proper turn on of thyristor____________?
After proper turn on of thyristor____________?A. gate signal is always present
B. gate signal must be removed
C. gate signal should present but can be removed
D. none of the above.An ideal diode is___________?
An ideal diode is___________?A. Unidirectional
B. Bidirectional
C. Fixed voltage polarity
D. Only (a) and (c)For series connected SCR’s dynamic equalising circuit consists of___________?
For series connected SCR’s dynamic equalising circuit consists of___________?A. R and C in series but with diode across C
B. R and C in series but with diode across R
C. Series R and diode with C across R
D. Series R and diode with C across RIn constant frequency PWM, at perturbation the amplitude of the sinusoidal component is a___________?
In constant frequency PWM, at perturbation the amplitude of the sinusoidal component is a___________?A. Linear function
B. Non linear function
C. Constant function
D. None of these