Exercise: Power Electronics

Questions for: Power Electronics

As compared to a p-n junction diode
A:
a schottky diode has lower cut in voltage and lower reverse saturation current
B:
a schottky diode has higher cut in voltage and higher reverse saturation current
C:
a Schottky diode has lower cut in voltage and higher reverse saturation current
D:
a schottky diode has higher cut in voltage and lower reverse saturation current
Answer: C
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In disc mounting of SCR
A:
SCR is clamped on one side of disc shaped heat sink
B:
SCR is clamped between two disc shaped heat sinks
C:
The SCR has low current rating
D:
None of the above
Answer: B
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The effect of source inductance in a 3 phase fully controlled bridge converter is to
A:
decrease the output voltage
B:
increase the output voltage
C:
decrease the output voltage and increase the output current
D:
increase the output voltage and decrease the output current
Answer: A
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The snubber circuit consists of
A:
a capacitor connected in series with thyristor
B:
a capacitor connected in parallel with thyristor
C:
a resistor and capacitor in series connected across thyristor
D:
none of the above
Answer: C
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A single phase dual converter consists of
A:
two fully controlled converters connected in parallel
B:
two fully controlled converters connected in antiparallel
C:
two fully controlled semiconverters connected in antiparallel
D:
two fully controlled semiconverters connected in parallel
Answer: B
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