question_answer

Different voltage are applied across a p-n junction and the currents are measured for each value. Which of the following graphs is obtained between voltage V and current  ?

A)

B)

C)                                

D)

Correct Answer: B

Solution :

                 When a p-n junction is connected in forward bias that is positive of battery top-type junction and negative to n-type, then the junction operates in forward bias and large emitter current while with reverse connections the junction operates in reverse bias with very small emitter current.