Which of the following materials has the maximum energy gap?
Correct answer: A. Insulator
- A. Insulator
- B. Conductor
- C. Semiconductor
- D. Superconductor
Explanation
The correct answer is Insulator. Insulators have the largest energy gap among the given options, which prevents electrons from easily transitioning to the conduction band, thus inhibiting electrical conductivity. In contrast, conductors have either overlapping bands or very small energy gaps, allowing electrons to move freely. Semiconductors have a smaller energy gap than insulators, which can be overcome under certain conditions. Superconductors, when in their superconducting state, have negligible energy gaps, allowing for resistance-free electron flow.
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About Electrical Properties of Solids
Electrical properties of solids depend on their band structure, charge carriers and conductivity. The topic compares conductors, insulators and semiconductors, relates resistivity to temperature, and covers intrinsic and extrinsic semiconductors, donor and acceptor impurities, electron and hole conduction, and the formation of p-type and n-type materials.
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