The voltage current variation of two metallic wires $X$ and $Y$ at constant temperature are shown below. Assuming that the wires have the same length and the same diameter, explain which of the two wires will have larger resistivity.
The voltage current variation of two metallic wires $X$ and $Y$ at constant temperature are shown below. Assuming that the wires have the same length and the same diameter, explain which of the two wires will have larger resistivity.
From the graph, we find that slope of graph $X > $ slope of graph $Y$
Thus, conductance of $X$ is more than that of $Y$. In other words, resistance of $Y$ is more than that of $X$. Hence, for the same $L$ and $A$, wire $Y$ will have larger resistivity.
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