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NEET Sample Paper NEET Sample Test Paper-26

  • question_answer
    A conductor with rectangular cross-section has dimensions \[(a\times 2a\times 4a)\] as shown in figure: Resistance across AB is X, across CD is Y and across EF is Z, then:

    A)  \[X=Y=Z\]                   

    B)  \[Y>Z>X\]

    C)  \[X>Y>Z\]                

    D)  \[X>Z>Y\]

    Correct Answer: D

    Solution :

    As,   \[R=\frac{\rho l}{{{A}^{1}}}\] \[\therefore \]  \[X=\rho \frac{4(a)}{(a)\,(2a)}=\frac{2\rho }{a}\] and        \[Y=\frac{\rho (a)}{(4a)(2a)}=\frac{2\rho }{a}\] then clearly,      \[X>Z>Y\].


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