Question

In the forward bias characteristic curve of a p-n junction diode, the current increases exponentially with voltage. What is the primary reason for this rapid increase?

Options

• Minority carrier flow across the junction

• Majority carrier flow across the junction

• Breakdown of the junction at high voltage

• Reduction in the depletion layer width to zero

Answer 1

Majority carrier flow across the junction

Explanation:

In forward bias, the applied voltage reduces the potential barrier at the junction, allowing majority carriers (electrons from n-side and holes from p-side) to flow across easily. This results in an exponential increase in current with increasing voltage, as seen in the forward bias characteristic curve.