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Discussion :: Network Analysis and Synthesis

  1. A conductor has a cylindrical shape with a diameter d. Its resistance is 2 Ω. It is recast into a cylindrical conductor of diameter 0.3d. The resistance of new conductor is likely to be

    2. A.
    less than 2 Ω
    B.
    less than 0.6 Ω
    C.
    between 2 and 100 Ω
    D.
    more than 100 Ω

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    Answer : Option D

    Explanation :

    Since new diameter is 0.3 d, the new area of cross-section a (0.3 d)2.

    The volume remains the same. Therefore length increase by a factor .

    Hence .

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