Thyristor Questions and Answers
Power Electronics Objective Questions & Answers
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To avoid commutation failure
Correct!
Wrong!
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The area under the curve of the gate characteristics of thyristor gives the
Correct!
Wrong!
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The gate characteristics of thyristor is a plot of
Correct!
Wrong!
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During the transition time or turn-on time
Correct!
Wrong!
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For an SCR the total turn-on time consists of
i) Delay time
ii) Rise time and the
iii) Spread time
The spread time interval depends upon
i) Delay time
ii) Rise time and the
iii) Spread time
The spread time interval depends upon
Correct!
Wrong!
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The latching current is _________ than the holding current
Correct!
Wrong!
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For an SCR the total turn-on time consists of
i) Delay time
ii) Rise time and
iii) Spread time
During the rise time the
i) Delay time
ii) Rise time and
iii) Spread time
During the rise time the
Correct!
Wrong!
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The minimum value of anode current below which it must fall to completely turn-off the device is called as the
Correct!
Wrong!
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For an SCR the total turn-on time consists of
i) Delay time
ii) Rise time and
iii) Spread time
During the delay time the
i) Delay time
ii) Rise time and
iii) Spread time
During the delay time the
Correct!
Wrong!
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For effective turning off of the SCR after the anode current has reached zero value, _________
Correct!
Wrong!
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Thyristors-3
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