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Semiconductors Solved Examples for JEE Video Lecture | Physics for JEE Main & Advanced

FAQs on Semiconductors Solved Examples for JEE Video Lecture - Physics for JEE Main & Advanced

1. What are semiconductors and how are they different from conductors and insulators?

Ans. Semiconductors are materials that have conductivity between that of conductors and insulators. They have the ability to conduct electricity under certain conditions, unlike insulators which do not conduct electricity at all. Semiconductors have a band gap between the valence band and conduction band, which allows them to conduct when excited.

2. How do semiconductors work in electronic devices such as transistors?

Ans. In electronic devices like transistors, semiconductors are doped to either increase the number of free charge carriers (n-type doping) or create holes where electrons can move (p-type doping). By controlling the flow of electrons and holes in the semiconductor material, transistors can amplify or switch electronic signals.

3. Can you give an example of a common semiconductor material used in electronic devices?

Ans. Silicon is the most commonly used semiconductor material in electronic devices. It is abundant, easy to work with, and has excellent electrical properties that make it ideal for use in transistors, diodes, and integrated circuits.

4. How are semiconductors classified based on their conductivity?

Ans. Semiconductors are classified as either intrinsic or extrinsic based on their conductivity. Intrinsic semiconductors are pure semiconducting materials like silicon or germanium, while extrinsic semiconductors are doped with impurities to change their conductivity.

5. What is the significance of the band gap in semiconductors?

Ans. The band gap in semiconductors determines their electrical conductivity. A smaller band gap allows electrons to move more easily between the valence and conduction bands, making the material more conductive. Conversely, a larger band gap restricts electron movement, resulting in lower conductivity.

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Oct 07, 2025 Last updated

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	Physics for JEE Main & Advanced 268 videos\|756 docs\|171 tests

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