GATE EC 2023 Set 1 — Question 16

MCQ+1 / -0.33EasyFermi Level & DopingSemiconductor PhysicsElectronic Devices

Electronic Devices → Semiconductor Physics → Fermi Level & Doping

Last updated 5 September 2026

Question

In a semiconductor, if the Fermi energy level lies in the conduction band, then the semiconductor is known as

Correct answer (A) degenerate n-type. Solution In a semiconductor, if the Fermi energy level lies within the conduction band, it indicates that the concentration of electrons in the conduction band is very high, exceeding the effective density of states in the conduction band. This condition is known as a degenerate n-type semiconductor. In such a material, the conduction band is heavily populated with electrons, making the material highly conductive due to electron flow. Therefore, the correct option is (A). Turn this into a strength. Explore AI-powered practice and doubt support with Success Tracker.

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Correct answer (A) degenerate n-type. Solution In a semiconductor, if the Fermi energy level lies within the conduction band, it indicates that the concentration of electrons in the conduction band is very high, exceeding the effective density of states in the conduction band. This condition is known as a degenerate n-type semiconductor. In such a material, the conduction band is heavily populated with electrons, making the material highly conductive due to electron flow. Therefore, the correct option is (A).

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