Question

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

• A. in forward bias the voltage across R is V
• B. in reverse bias the voltage across R is V
• C. in forward bias the voltage across R is 2V
• D. in reverse bias the voltage across R is 2V.

Answer 1

Answer: (A)

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