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What do you understand by natural reverse commutation for a diode?
Select one: a. A commutation process caused by ambiental natural causes b. A commutation process produced by the current Increase above a certain level • c. A reverse commutation process produced by a sudden negative voltage across the diode d. A commutation process producing a reversal of the current direction e. A reverse commutation process at zero current
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What is the difference between current and voltage commutation?
Voltage commutation: This is possible in ac circuits...The thyristor gets turned off by reverse bias (negative half cycle) voltage applied across it. This is also called line commutation. Current Commutation: This is possible in dc circuits ...This type of commutation makes use of auxiliary circuit which contains inductor,capacitor,diode and even a thyristor(auxiliary). This is called Forced commutation.
Why a diode is connected parallel to a dc motor in its speed control circuit?
A motor is a mass of wires classified as a coil. Coils have a decency to generating reverse voltage when commutation the diode therefore is there for clipping this harmful back EMF
What is diode reverse current?
the current which has negative value n passes through the diode is called as diode reverse current
Reverse characteristics graph of pn junction diode?
what is the difference between reverse characteristics of zener diode and a practical diode ?
When both junction of npn diode reverse biased the the diode in what state?
reverse biased
What do you mean by peak reverse voltage of semiconductor diode?
Peak reverse voltage of a diode is the maximum reverse bias voltage can be applied to diode which does not cause break down.
How is a non-conducting diode biased?
A nonconducting diode is biased in the reversed direction (reverse polarization).
What is the explanation for the Operation of varicap diode?
The capacitance of a varicap diode varies as the reverse voltage to the diode changes. As you increase the reverse voltage, the capacitance decreases. And vice versa.
What are specifications of pn junction diode?
This can vary significantly from diode to diode (especially the reverse recovery time and peak reverse breakdown voltage), so always consult the datasheet.
What is Reverse Saturation Current of a diode?
When a diode is operated as reverse bias the current flow is almost completely blocked. A small amount of current is still able to travel in reverse through the diode and this is referred to as the reverse current saturation.
What is the reverse bias diode?
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When the both junction of NPN diode is reverse biased then the diode is mode?
cutoff
