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Current flows in a reverse biased diode because diodes are not ideal. They do have leakage current and a breakdown voltage in reverse, just as they have a breakdown current in forward and a non-linear and non-parallel forward voltage to current curve.
It is also possible that you are looking at a zener diode. A zener diode is specifically design to conduct at a certain voltage in reverse.
Wiki User
∙ 14y ago
Wiki User
∙ 11y agoIn reverse bias condition the barrier between a pn junction of a semiconductor becomes stronger(or depletion region width increases) and hence electron flow does not happen. If no electron flow then no current.
In the reverse bias condition, the diode acts as an open switch due to the fact that there is not enough majority charge carries to suppress the potential barrier created in the pn junction.
Wiki User
∙ 13y agoA: Current flow anytime there is a voltage source.
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Why high value resistor used in reverse bias diode circuit?
In a reverse bias condition of a circuit current initially remains the same for low voltage but at the breakdown voltage current increases fast even for a small increase in voltage.hence.........
Does zener diode utilize a larger current?
A zener diode, in the reverse bias condition, presents a higher voltage. The current, however, is a function of the supplying circuit.
What are the sources of reverse current in a diode?
doping concentration,temperature are the major source of reverse current
Why photodiode is reverse biased?
In a photo-diode when light is incident, the fractional increase in the majority carriers is much less than the fractional increase in the minority carriers. Consequently, the fractional change due to the photo-effects on the minority carrier dominated reverse bias current is more easily measurable than the fractional change due to the photo-effects on the majority carrier dominated forward bias current. Hence, photo-diodes are preferred to be used in the reverse bias condition to easily observe the variation of current with intensity.
The primary control on drain current in a JFET is exerted by?
Gate reverse bias
Why high value resistor used in reverse bias diode circuit?
In a reverse bias condition of a circuit current initially remains the same for low voltage but at the breakdown voltage current increases fast even for a small increase in voltage.hence.........
Does diode flow current in reverse bias?
Diodes will have a small leakage current in reverse bias. In most cases, this current can be considered insignificant and ignored.
Reverse saturation current of Ge diode?
Reverse saturation current of germanium diodeThe current that exists under reverse bias conditions is called the reverse saturation current. Reverse saturation current of the germanium diode is typically 1 micro ampere or 10-6 a.At a fixed temperature, the reverse saturation current of a diode increases with increase in applied reverse bias. In reverse bias region the reverse saturation current also varies with the temperature.
Does zener diode utilize a larger current?
A zener diode, in the reverse bias condition, presents a higher voltage. The current, however, is a function of the supplying circuit.
What will happen to the emitter current if the emitter base is reversed biased?
as we know that in reverse bias condition no current is produced and if it produced by the minority charge carrier then also the current produced is in very less amount so u can say that emitter current will reduced to large extend as compare to emitter current in forward bias condition
What are the sources of reverse current in a diode?
doping concentration,temperature are the major source of reverse current
What is breakdown condition?
all most 50Volts when diode is in reverse bias.
Why diode conducts current in forward bias but does not conduct in reversed bias?
diode current flows only when the diode is forward biased because in reverse bias the barrier potential increases. Diode can conduct in reverse bias if applied votage is high enough to overcome the reverse bias barrier potential but it can be destructive.
Why photodiode is reverse biased?
In a photo-diode when light is incident, the fractional increase in the majority carriers is much less than the fractional increase in the minority carriers. Consequently, the fractional change due to the photo-effects on the minority carrier dominated reverse bias current is more easily measurable than the fractional change due to the photo-effects on the majority carrier dominated forward bias current. Hence, photo-diodes are preferred to be used in the reverse bias condition to easily observe the variation of current with intensity.
The primary control on drain current in a JFET is exerted by?
Gate reverse bias
Why do diode has two resistance values in ieone in forward bias other in reverse bias?
because the current push to the junction.
Why photodiode works only in reverse bias not in forward bias?
The fractional change due to intensity on minority charge carriers is more than on majority charge carriers. When light is directly polarized it acts like a normal diode but when reverse polarized its current depends on the brightness (intensity of incident light).
