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(A) The specific resistance (resistivity) of a metal is defined by the property of the material. For metals,the resistivity $\rho$ is given by the rel

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Temperature

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(A) The specific resistance (resistivity) of a metal is defined by the property of the material. For metals,the resistivity $ho$ is given by the relation $ho = \frac{m}{ne^2	au}$,where $m$ is the mass of the electron,$n$ is the number density of free electrons,$e$ is the charge of the electron,and $	au$ is the relaxation time. As the temperature increases,the thermal vibrations of the lattice ions increase,which leads to a decrease in the relaxation time $	au$. Since $ho \propto \frac{1}{	au}$,the resistivity of metals increases significantly with an increase in temperature. Therefore,temperature is the most significant factor affecting the specific resistance of metals.

The specific resistance of all metals is most affected by

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