In which operational condition does a diode experience low resistance and conduct current?

The condition in which a diode experiences low resistance and conducts current is known as forward bias. In forward bias, the positive voltage is applied to the anode and the negative voltage to the cathode, allowing current to flow easily through the diode. This occurs because the external voltage reduces the barrier that normally prevents current from flowing, facilitating the movement of charge carriers (electrons and holes) across the junction.

In contrast, during reverse bias, the applied voltage is opposite to the preferred direction, which increases the barrier and prevents current from flowing, resulting in high resistance. Neutral bias is not a standard term regarding diode operation, and the diode does not operate in a conductive state during this condition. The open state implies that the diode is not conducting, facing high resistance as it remains non-conductive. Thus, the forward bias condition is essential for understanding how diodes work in circuits, allowing them to perform their function of allowing current flow in one direction.