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The voltage - current (V-1) graphs for a...

The voltage - current (V-1) graphs for a metallic conductor at two different temperatures `T_1 and T_2` are shown below:

At which temperature is the resistance higher?

Text Solution

Verified by Experts

At temperature `T_1`.
Because, the slope `((DeltaV)/(DeltaI))` of the graph i.e., its resistance is greater at `T_1`.
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Knowledge Check

  • Two ideal Carnot engines opeate in cascade (all heat given up by one engine is used by the other engine to produce work) between temperatures T_(1) and T_(2) . The temperature of the hot reservoir of the first engine is T_(1) and the temperature of the cold reservoir of the second engine is T_(2) . T is the temperature of the sink of first engine which isi also the source for the second engine. How is T related to T_(1) and T_(2) if both the engines perform equal amount of work?

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