Question
The voltage - current $(V-I)$ graphs for a metallic conductor at two different temperatures $T_1$ and $T_2$ are shown below :
At which temperature is the resistance higher ?
At which temperature is the resistance higher ?
✓
Answer
At temperature $T_1$.
Because, the slope $\left(\frac{\Delta V}{\Delta I}\right)$ of the graph i.e., its resistance is greater at $T_1$.
Because, the slope $\left(\frac{\Delta V}{\Delta I}\right)$ of the graph i.e., its resistance is greater at $T_1$.
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