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  • In Fig. 14.1, Vo is the potential barrier across a p-n junction, when no battery is connected across the junction A. 1 and 3 both correspond to forward bias of junction B. 3 corresponds to forward bias of junction and 1 corresponds to reverse bias of junc

In Fig. 14.1, Vo is the potential barrier across a p-n junction, when no battery is connected across the junction

A. 1 and 3 both correspond to a forward bias of the junction
B. 3 corresponds to the forward bias of the junction and 1 corresponds to reverse bias of junction
C. 1 corresponds to forward bias and 3 corresponds to reverse bias of junction.
D. 3 and 1 both correspond to reverse bias of junction.

 

Answers (1)

The correct answer is the option b

Explanation:-

The height of a potential barrier increases when the p-n junction is biased forward, and it opposes the potential barrier junction. But if p-n is reversed biased, the potential barrier junction is supported, which results in an increase in the potential barrier.

  • Forward bias: When the p-type material is connected to the positive terminal of the battery and the n-type material is connected to the negative terminal, the p-n junction is forward-biased. This reduces the potential barrier, allowing current to flow easily across the junction.

  • Reverse bias: When the p-type material is connected to the negative terminal of the battery and the n-type material is connected to the positive terminal, the p-n junction is reverse biased. This increases the potential barrier, preventing current from flowing across the junction (except for a very small reverse leakage current).

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