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Question

The current voltage graph for a given metallic wire at two different temperatures T$$_1$$ and T$$_2$$ are shown in given figure, which of the relation is correct from the following?
356733_eb36118509354133aee7b96afbd7a288.png


A
T2>T1
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B
T1>T2
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C
T1=T2
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D
none of these
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Solution

The correct option is B $$T_1 > T_2$$
The slope ofthe graph at temperature T$$_1$$ is greater than that at temperature T$$_2$$.
So, $$tan  \theta_1 > tan  \theta_2$$
$$R_1 > R_2$$
i.e. $$T_1 > T_2$$

1100158_356733_ans_139baa958f8642f48bb5824e5875cd41.png

Physics

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