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JEE Main & Advanced Physics Semiconducting Devices Question Bank Solids and Crystals

  • question_answer
    A solid reflects incident light and it?s electrical conductivity decreases with temperature. The binding in this solids

    A)            Ionic                                        

    B)            Covalent

    C)            Metallic

    D)            Molecular

    Correct Answer: C

    Solution :

               Metals reflects incident light by the vibrations of free electrons under the influence of electric field of incident wave. The conductivity of metals decreases with increase of temperature due to increase in random motion of free electrons. The bonding is therefore metallic.


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