In a P-N junction diodea)The current in the reverse biased condition i...
P-N Junction Diode
A P-N junction diode is a two-terminal electronic component that allows current to flow in one direction and blocks it in the other direction. It is made up of a p-type semiconductor and an n-type semiconductor that are joined together.
Reverse Biased Condition
When a voltage is applied across the diode in the reverse direction, it is called the reverse biased condition. In this condition, the p-type semiconductor becomes negatively charged and the n-type semiconductor becomes positively charged. This causes the depletion region to widen, which makes it difficult for the current to flow through the diode.
Current in Reverse Biased Condition
The current in the reverse biased condition is generally very small because the depletion region is wide, and it acts as an insulator. The electrons and holes in the depletion region are pushed away from each other, which makes it difficult for them to recombine and produce current.
The reverse biased current is also called the leakage current, and it is strongly dependent on the applied bias voltage. As the voltage is increased, the depletion region widens, and the leakage current increases. However, the current is still very small compared to the forward biased current.
Forward Biased Condition
When a voltage is applied across the diode in the forward direction, it is called the forward biased condition. In this condition, the p-type semiconductor becomes positively charged, and the n-type semiconductor becomes negatively charged. This causes the depletion region to narrow, which allows the current to flow through the diode.
Current in Forward Biased Condition
The current in the forward biased condition is dependent on the bias voltage. As the voltage is increased, the current also increases. However, the current is not independent of the bias voltage as mentioned in option 'B'.
The forward biased current is much larger than the reverse biased current. In fact, the diode is designed to operate in the forward biased condition, and it is used in a wide range of electronic applications, such as rectifiers, voltage regulators, and signal detectors.
Conclusion
In conclusion, the correct answer to the question is option 'A'. The current in the reverse biased condition is generally very small because the depletion region acts as an insulator, and it is difficult for the current to flow through the diode. The reverse biased current is also strongly dependent on the applied bias voltage.