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Discussion :: Materials and Components

  1. A parallel plate capacitor has its length, width and separation doubled. It fringing effects are neglected, to keep the capacitance same, the dielectric constant must be

    2. A.
    halved
    B.
    kept the same
    C.
    doubled
    D.
    made 4 times

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    Answer : Option A

    Explanation :

    . When dimensions are changed, A become four times and d becomes twice.

    Since ∈0 is constant, ∈r must be halved to keep C constant.

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