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Question

If the forward voltage in a p-n junction diode is increased, the width of the depletion region:

The correct answer is

Decreases

In a p-n junction diode, the depletion region is formed due to the diffusion of charge carriers, creating an electric field.
- In forward bias, applying a positive voltage reduces the built-in potential, allowing more charge carriers to flow.
- As a result, the depletion width decreases because the external voltage reduces the barrier for charge movement.
Thus, the correct answer is (b).

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Important Questions from Semiconductor and Electronic Devices

  1. Silicon can be doped using one of the following elements as dopant:

    (A) Arsenic
    (B) Indium
    (C) Phosphorus
    (D) Boron

    To get an n-type semiconductor, the dopants that can be used are:

  2. Let iE​, iC​, and iB​ represent the emitter current, collector current, and the base current respectively in a transistor. Choose the correct statement:

  3. A Zener diode is used in a voltage regulator circuit as shown below. Its breakdown voltage is 15 V. What is the current flowing through the Zener diode?

  4. Choose the correct experimental circuit arrangement for studying V-I characteristics of a p-n junction diode in forward bias:

  5. During the p-n junction formation, when an electron diffuses from n → p, it leaves behind an:

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