Which of following is not a power transistor?
Which of following is not a power transistor?
A. IGBTs
B. COOLMOS
C. TRIAC
D. SITS
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AC 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 seriesDuring the commutation period in 3 phase converter, overlap time is_____________?
During the commutation period in 3 phase converter, overlap time is_____________?A. Dependent on the load current
B. Dependent on the voltage
C. Dependent on both the load current and load voltage behind the short circuit current
D. Independent on both the load current and load voltageLISN is a device used to measure conducted emissions. LISN stands for_____________?
LISN is a device used to measure conducted emissions. LISN stands for_____________?A. Line integrated stabilization network
B. Line impedance stabilization network
C. Line integrated stored network
D. Laser integrated stabilization networkingA GTO can be turned on by applying___________?
A GTO can be turned on by applying___________?A. Positive gate signal
B. Positive drain signal
C. Positive source signal
D. None of thesePower electronics essentially deals with control of a.c. power at____________?
Power electronics essentially deals with control of a.c. power at____________?A. Frequencies above 20 kHz
B. Frequencies above 1000 kHz
C. Frequencies less than 10 Hz
D. 50 Hz frequencyIn a 3 phase half wave rectifier, when firing angle is less than 90 degree, then the average dc output voltage becomes__________________?
In a 3 phase half wave rectifier, when firing angle is less than 90 degree, then the average dc output voltage becomes__________________?A. Positive
B. Negative
C. Zero
D. None of these