In a reverse-biased P-N junction diode, the current is primarily due to:Options :Electron flow from N to P regionHole flow from P to N regionMajority charge carriersMinority charge carriers
Question
In a reverse-biased P-N junction diode, the current is primarily due to:Options :Electron flow from N to P regionHole flow from P to N regionMajority charge carriersMinority charge carriers
Solution
In a reverse-biased P-N junction diode, the current is primarily due to the Minority charge carriers.
Here's why:
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In a P-N junction diode, the P-region has a majority of holes (positive charge carriers) and the N-region has a majority of electrons (negative charge carriers).
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When the diode is reverse-biased, the positive terminal of the battery is connected to the N-region and the negative terminal is connected to the P-region. This increases the barrier potential and widens the depletion region.
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In this condition, the majority charge carriers (holes in P-region and electrons in N-region) are pulled away from the junction, making it difficult for them to cross the junction.
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However, the minority charge carriers (electrons in P-region and holes in N-region) are pushed towards the junction by the external voltage. These minority carriers can cross the junction and contribute to the current.
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Therefore, in a reverse-biased P-N junction diode, the current is primarily due to the minority charge carriers.
Similar Questions
In a P-N junction diode, the reverse current:Options :Increases with increasing reverse voltageIs not affected by reverse voltageRemains constant with increasing reverse voltageDecreases with increasing reverse voltage
The current due to minority carrier in PN junction diode is of the order of
Give the forward biased and reverse biased characteristics of a p-n junction diode.
Briefly explain conduction of a p-n junction diode in forward bias mode.a.Dark currents, friction, humidity and aging, enhances p and n type regions in the neutral region/depletion region until when it overcomes the potential barrier for the p-n junction to start conducting.b.Increase in pressure enhances p and n type regions in the neutral region/depletion region until when it overcomes the potential barrier for the p-n junction to start conducting.c.Increase in temperature enhances p and n type regions in the neutral region/depletion region until when it overcomes the potential barrier for the p-n junction to start conducting.d.External field enhances p and n type regions in the neutral region/depletion region until when it overcomes the potential barrier for the p-n junction to start conducting.
The depletion region in a semiconductor p-n junction diode has Options :Electrons and holesPositive and negative ions on either sideNeither electrons nor ionsNo holes
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