Physics Class 12
Solutions to CBSE Sample Paper - Physics Class 12

The graph of potential barrier versus width of depletion region for an unbiased diode is shown in graph A. In comparison to A ,graphs B and C are obtained after biasing the diode in different ways .Identify the type of biasing in B and C and justify your answer.

Question 23b - The graph of potential - teachoo.jpg



B - reverse biased

In the case of reverse biased diode the potential barrier becomes higher as the battery further raises the potential of the n side.


C -forward biased

Due to forward bias connection the potential of P side is raised and hence the height of the potential barrier decreases.

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.