本题目来源于试卷: Molecules and Solids，类别为 IB物理学
[问答题]
Explain why the resistivity of metals increases with temperature whe dqg2 - k6wub5hul0(lprem3 n)uj zminth7 .:v-k1-somn as the resistivitj numn )v:kn7 h3.s o1-izmmt-y of semiconductors may decrease with increasing temperature.
参考答案:
As you increase the temperature of a metal, the amount of disorder increases and this makes it more difficult for the conduction electrons to move through the metal. Thus, the resistivity increases with increasing temperature. As you increase the temperature of a semiconductor, the small band gap between the valence band and the conduction band can now be “jumped” by the thermally excited electrons and this means there are more conduction electrons available to move through the semiconductor. Thus, the resistivity decreases with increasing temperature.
本题详细解析:
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