A)
B)
C)
D)
Correct Answer: B
Solution :
Key Idea: In forward biasing of p-n junction p-side is given more positive voltage than n-side. For forward biasing of p-n junction, p-side should be at higher potential than n-side. Now we apply this rule to the four options. Here, p-side is at lower potential (OV) and n-side at higher potential (2V). So this diode is not forward biased. Here, p-side is at higher potential (OV) and n-side at lower potential (-2V). So, this diode is forward biased. Here, p-side is at lower potential (-2V) and n-side at higher potential (OV). So, this diode is not forward biased. Here p-side is at lower potential (2V) and n-side at higher potential (5V). So, this is not forward biased. Hence, choice (b) is correct.
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