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JAMIA MILLIA ISLAMIA Jamia Millia Islamia Solved Paper-2013

  • question_answer
        On increasing the temperature of a conductor, its resistance increase because the

    A)  relaxation time increases

    B)  mass of electron increases

    C)  electron density decreases

    D)  relaxation time decreases

    Correct Answer: D

    Solution :

                    We have, \[R=\frac{m}{n{{e}^{2}}\tau }.\frac{\lambda }{A}\] From this relation when temperature increases t decrease; so the relaxation time decreases.


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