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  4. For the given circuit of p-n junction diode which is correct :-

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Q. For the given circuit of $p-n$ junction diode which is correct :-Physics Question Image

AIPMTAIPMT 2002Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

In forward biasing, the resistance of p-n junction diode is very low to the flow of current.
So practically all the voltage will be dropped across the resistance p, i.e. voltage across R will be V.
In reverse biasing, the resistance of p-n junction diode is very high. So the voltage drop across R is zero