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The $I$ - $V$ characteristics of a metal wire at two different temperatures $\left(T_{1}\right.$ and $T_{2}$ ) are given in the adjoining figure. Here, we can conclude that 
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$T_{1} < T_{2}$
$R$ increases with temperature and slope of $V \cdot I$ graph gives resistance so $T_{1} < T_{2}$
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