Why does the resistance of metallic conductor | vedclass

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(C) In metallic conductors,the number of charge carriers (free electrons) is constant,but as temperature increases,the amplitude of vibration of latti

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Change in the number of charge carriers with temperature

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(C) In metallic conductors,the number of charge carriers (free electrons) is constant,but as temperature increases,the amplitude of vibration of lattice ions increases,leading to more frequent collisions (scattering),which increases resistance. In semiconductors,the number of charge carriers (electrons and holes) increases exponentially with temperature due to the breaking of covalent bonds,which significantly decreases resistance. Therefore,the primary reason for the difference in temperature dependence is the change in the number of charge carriers with temperature.

Why does the resistance of metallic conductors and semiconductors change differently with a change in temperature?

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