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Electronics and Communication Engineering - Power Electronics

Exercise : Power Electronics - Section 8
41.
As compared to a p-n junction diode
a schottky diode has lower cut in voltage and lower reverse saturation current
a schottky diode has higher cut in voltage and higher reverse saturation current
a Schottky diode has lower cut in voltage and higher reverse saturation current
a schottky diode has higher cut in voltage and lower reverse saturation current
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
From which instant is the turn off time of a thyristor defined
when anode voltage becomes zero
when anode current becomes zero
when both anode voltage and current become zero
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
In a single phase cycloconverter with centre tapped transformer
all thyristors carry currents for equal duration
the durations of currents in all thyristors may or may not be equal
the durations of currents in all thyristors cannot be equal
the duration of currents in all thyristors must be equal for satisfactory operation
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
If Ar and Ac are the amplitudes of reference and control signals, the modulation index M is
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
Thyristors can be used for control of
dc separately excited motor
dc shunt motor
dc series motor
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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