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Show variation of resistivity of (i) con...

Show variation of resistivity of (i) conductor (i.e. copper) (ii) semiconductor (sI) with temperature is a graph. Give reason.

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The resistivity of a conductor increases linearly with increases of temperaure and if a graph is plotted between resistivity and temperature it will be a striaght line. However at a temperature below `0^(@)` the graph deviates considerably from the striaght line

(a) shows the variation resistivity of copper in low temperature range.
(b) At 0K, the semiconductor has a n infinite value of resistivity.
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