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Electrical Properties (Conductors, Insulators & Semiconductors) Video Lecture - NEET

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FAQs on Electrical Properties (Conductors, Insulators & Semiconductors) Video Lecture - NEET

1. What are conductors, insulators, and semiconductors in terms of electrical properties?
Ans. Conductors, insulators, and semiconductors are materials that exhibit different levels of electrical conductivity. Conductors are materials that allow the free flow of electric charge, such as metals. Insulators, on the other hand, are materials that prevent the flow of electric charge, like rubber or plastic. Semiconductors are materials that have intermediate conductivity, such as silicon or germanium.
2. How do conductors, insulators, and semiconductors differ in terms of their band structure?
Ans. Conductors have partially filled or overlapping energy bands, which allows the flow of electric charge. Insulators have completely filled valence bands and large energy gaps between the valence and conduction bands, preventing the flow of charge. Semiconductors have partially filled valence bands and small energy gaps, allowing them to conduct at higher temperatures or when subjected to certain conditions.
3. What factors determine the electrical conductivity of a material?
Ans. The electrical conductivity of a material is determined by several factors, including the density of charge carriers (electrons or holes), mobility of these charge carriers, and the presence of impurities or defects in the material. Higher charge carrier density and mobility generally lead to higher conductivity.
4. How does temperature affect the electrical conductivity of conductors, insulators, and semiconductors?
Ans. Temperature has different effects on the electrical conductivity of conductors, insulators, and semiconductors. In conductors, increasing temperature generally leads to an increase in resistance and decrease in conductivity due to increased scattering of charge carriers. In insulators, higher temperatures can lead to the generation of additional charge carriers, increasing conductivity. Semiconductors typically show an increase in conductivity with temperature due to increased charge carrier mobility.
5. What are some common applications of conductors, insulators, and semiconductors?
Ans. Conductors are widely used in electrical wiring, transmission lines, and electronic components like resistors and capacitors. Insulators find applications in electrical insulation, insulating coatings, and protective gear. Semiconductors are essential components in electronic devices such as transistors, diodes, and integrated circuits, enabling modern technology like computers, smartphones, and solar panels.
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