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Discussion :: Network Analysis and Synthesis

  1. A coil is wound having a diameter d. Its inductance is 10 mH. If it is rewound on the same core with a wire having diameter 0.5 d and total weight of the wire is the same as before, the inductance will be

    2. A.
    5 mH
    B.
    10 mH
    C.
    160 mH
    D.
    40 mH

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    Answer : Option C

    Explanation :

    Since diameter is halved, area of cross-section is one-fourth. The number of turns becomes four times. Inductance = μ N2.

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