How much resistance does a diode have in forward bias?

In forward bias, a diode has low resistance. This occurs because when a diode is forward-biased, it allows current to flow through it easily. The external voltage applied across the diode reduces the potential barrier, enabling charge carriers – electrons and holes – to recombine and create a current flow.

This low resistance characteristic is essential for the functioning of diodes in various applications, such as rectification in power supplies, where it's important for the diode to conduct with minimal resistance when in the forward direction. The low resistance allows for efficient current flow, which is crucial for the operation of electronic circuits.

Moreover, while a diode can demonstrate variable resistance under different conditions, such as temperature or the amount of current flowing through it, in the context of being forward-biased, it is predominantly considered to have low resistance. This consistent behavior in forward bias is what distinguishes it from other states, such as reverse bias, where the diode typically exhibits high resistance.