question_answer

A forward biased diode is:

A)   The Boolean expression which satisfies the output of this logic gate is \[C=A\]. B, which is for AND gate

B)  

C)  

D)              

Correct Answer: D

Solution :

Key Idea: For forward biasing of diode, p-side of diode should be at higher potential than n-side.

The \[p-n\] junction diode can be shown as :

If p-side of \[p-n\] junction diode is given more

positive potential than n-side, then it is forward biased.

In option [d], p-side is at 0V and n-side at –2V, so \[p\]  is at higher potential. Hence, it is forward biased.

Note:    \[p-n\] junction diode is mainly used as a rectifier.