JEE Main & Advanced Physics Mathematical Tools, Units & Dimensions Question Bank Units

  • question_answer
    The unit of specific resistance is [SCRA 1989; MP PET 1984; CPMT 1975]

    A) \[Ohm/c{{m}^{2}}\]

    B) \[Ohm/cm\]

    C) \[Ohm-cm\]

    D) \[{{(Ohm-cm)}^{-1}}\]

    Correct Answer: C

    Solution :

    \[R=\rho \frac{L}{A}\Rightarrow \rho =\frac{RA}{L}=ohm\times cm\]


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