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NEET Sample Paper NEET Sample Test Paper-88

  • question_answer
    Two resistors A and B have resistances \[{{R}_{A}}\] and \[{{R}_{B}}\] respectively with \[{{R}_{A}}<{{R}_{B}}.\] The resistivities of their materials are \[{{\rho }_{A}}\] and \[{{\rho }_{B}}.\] Then

    A) \[{{\rho }_{A}}>{{\rho }_{B}}\]

    B) \[{{\rho }_{A}}={{\rho }_{B}}\]

    C) \[{{\rho }_{A}}<{{\rho }_{B}}\]

    D) The information is not sufficient to find the relation between \[{{\rho }_{A}}\] and \[{{\rho }_{B}}\]

    Correct Answer: D

    Solution :

    [d] \[R=\rho \frac{l}{A}\] and \[\rho =\frac{m}{{{e}^{2}}n\tau }\]


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