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Question

The voltage V and current I graphs for a conductor at two different temperatures T1 and T2 are shown in the figure. The relation between T1 and T2 is?
941684_ea4acf60e11e4de3b3456112b40a2c72.png

A
T1>T2
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B
T1<T2
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C
T1=T2
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D
T1=1T2
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Solution

The correct option is A T1>T2
The slope of V-I graph gives the resistance of a conductor at a given temperature. From the graph, it follows that resistance of a conductor at temperature T1 is greater than at temperature T2. As the resistance of a conductor is more at high temperature and less at lower temperature, hence T1>T2.

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