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NTSE Sample Paper NTSE SAT Practice Test-8

  • question_answer
    The current I and voltage F graphs for a given metallic wire at two different temperatures \[{{T}_{1}}\] and \[{{T}_{2}}\] are shown in figure. It is concluded that

    A) T>T,

    B) T,<T,

    C) T,=T,

    D) Nothing can be decided

    Correct Answer: A

    Solution :

    [a] Slope of the graph gives us reciprocal of resistance. Resistance at temperature \[{{T}_{1}}\] is greater then that at temperature \[{{T}_{2}}\]. Because the resistance of metallic wire is more at higher temperature than at lower temperature, \[{{T}_{1}}>{{T}_{2}}.\]


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