In a DC circuit, two identical p-n junction diodes, D₁ and D₂ , are connected such that for D₁ , the potential at the p-side is higher than the potential at the n-side ( V_p > V_n ). For D₂ , the potential at the n-side is higher than the potential at the p-side ( V_n > V_p ). Which of the following correctly identifies the dominant current mechanism across the junction for each diode?

Step-by-step solution

For diode D₁ , the condition V_p > V_n means it is forward-biased. In forward bias, the applied voltage opposes the built-in potential barrier, reducing its height. This allows majority charge carriers to easily cross the junction, making diffusion current the dominant mechanism. For diode D₂ , the condition V_n > V_p means it is reverse-biased. In reverse bias, the applied voltage adds to the built-in potential, increasing the barrier height and practically stopping the diffusion of majority carriers. However, the