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Factors Affecting Resistance & How They Affect

The current ...

Question

The current $I$ and voltage $V$ graphs for a given metallic wire at two different temperatures $T_{1}$ and $T_{2}$ are shown in the figure. It is concluded that :

T_{1} > T_{2}

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T_{1} < T_{2}

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T_{1} = T_{2}

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T_{1} = 2 T_{2}

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Solution

The correct option is A $T_{1} > T_{2}$
Slope of the graph will give us reciprocal of resistance. Here resistance at temperature $T_{1}$ is greater than that of $R_{2}$ . Since resistance of metallic wire is more at higher temperature than at lower temperature, hence $T_{1} > T_{2}$

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The current I and voltage V graphs for a given metallic wire at two different temperatures T1 and T2 are shown in the figure. It is concluded that :

The correct option is A T1>T2Slope of the graph will give us reciprocal of resistance. Here resistance at temperature T1 is greater than that of R2. Since resistance of metallic wire is more at higher temperature than at lower temperature, hence T1>T2

The current $I$ and voltage $V$ graphs for a given metallic wire at two different temperatures $T_{1}$ and $T_{2}$ are shown in the figure. It is concluded that :

The correct option is A $T_{1} > T_{2}$
Slope of the graph will give us reciprocal of resistance. Here resistance at temperature $T_{1}$ is greater than that of $R_{2}$ . Since resistance of metallic wire is more at higher temperature than at lower temperature, hence $T_{1} > T_{2}$