J & K CET Engineering J and K - CET Engineering Solved Paper-2010

  • question_answer
    Based on the energy band description, a solid can be classified as insulator the energy gap between the valance band and conduction band is

    A)  \[3\,\,eV<{{E}_{g}}<6\,eV\]

    B)  \[{{E}_{g}}>6\,eV\]

    C)  \[{{E}_{g}}<3\,eV\]

    D)  \[{{E}_{g}}=0\,eV\]

    Correct Answer: B

    Solution :

    In insulators, the forbidden energy gap is quite large. For example, the forbidden energy gap for diamond is \[6\text{ }eV,\]which means that minimum of 6 eV energy is required to make the electron jump from the completely filled valence band to conduction band.


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