CHARACTERISTICS OF AN IDEAL DIODE
When we talk about the ideal diode, the diode is a device which acts as a short circuit when forward biased and acts as open circuit when reverse biased. Hence the behavior of ideal diode can be shown in the following graph:
In forward biased, current is zero till the point forward voltage is less than breakdown voltage and after that diode offers no resistance while in the reverse biased, there is no current flow at all.
CHARACTERISTICS OF A PRACTICAL DIODE