The variations of resistivity rho with absolu | vedclass

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(A) In the given graph:$1$. For material $Z$,resistivity $\rho$ decreases exponentially with an increase in temperature $T$. This is a characteristic

Vedclass · Accepted Answer

$X$ - copper,$Y$ - nichrome,$Z$ - semiconductor

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(A) In the given graph:$1$. For material $Z$,resistivity $\rho$ decreases exponentially with an increase in temperature $T$. This is a characteristic property of semiconductors.$2$. For material $Y$,resistivity $\rho$ increases linearly with temperature $T$. This is a characteristic property of alloys like nichrome,which have a very small temperature coefficient of resistance.$3$. For material $X$,resistivity $\rho$ increases non-linearly with temperature $T$. This is a characteristic property of metals like copper.Therefore,$X$ is copper,$Y$ is nichrome,and $Z$ is a semiconductor.

The variations of resistivity $\rho$ with absolute temperature $T$ for three different materials $X, Y$ and $Z$ are shown in the graph below. Identify the materials $X, Y$ and $Z$.

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