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COMEDK2023Evening ShiftPhysicsSemiconductorsActual

The energy gap between valance band and the conduction band for a given material is 6 ~eV , then the material is :

Options

  1. AA superconductor
  2. BAn insulator
  3. CA metal
  4. DA semiconductor

Correct answer

B. An insulator

Step-by-step solution

The electrical conductivity of a solid depends on the energy gap ( E_g ) between the valence band and the conduction band. Materials are classified based on the magnitude of this energy gap: 1. Metals: The valence band and conduction band overlap, or the gap is zero. 2. Semiconductors: The energy gap is small, typically around 1 eV to 3 eV . 3. Insulators: The energy gap is large, typically greater than 3 eV to 5 eV . Given that the energy gap for the material is 6 eV , which is significantly greater than 3 eV , th

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