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Discussion :: Electromagnetic Field Thoery

  1. A material has conductivity of 10-2 mho/m and a relative permittivity of 4. The frequency at which conduction current in the medium is equal to displacement current is

    2. A.
    45 MHz
    B.
    90 MHz
    C.
    450 MHz
    D.
    900 MHz

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    Answer : Option A

    Explanation :

    Conduction current density J = wD

    J = σE σE = ωD = 2p fD

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