Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Semiconductors and Electronic Devices

Question:

Read the passage and answer the question.

When the two types of semiconductors are joined together, diffusion of electrons and holes from their side of excess takes place and continues for a while after which a depletion layer is formed close to the junction on either side which stops any further diffusion of these carriers. A potential difference appears to have set up at the junction.

You are given a p-n diode connected to a potential difference such that the p-side is connected to -5 V and the n-side is connected to -3V. What can you say about this?

Options:

The junction is forward biased if the polarity of the potential difference and p-n diode is reversed

The junction is forward biased now

The junction is reverse biased now

none of the above

Correct Answer:

The junction is reverse biased now

Explanation:

The n-side is connected to a higher potential than p-side. Thus the junction is reversed biased.