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Discussion :: Materials and Components

  1. A vacuum parallel plate capacitor is charged. The field between the plates is 2 x 104 V/m. If the space between the plates is filled with a material having ∈r = 10, then the value of field in the dielectric will be

    2. A.
    2 x 103 V/m
    B.
    x 104 V/m
    C.
    210 x 104 V/m
    D.
    2 x 105 V/m

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    Answer : Option A

    Explanation :

    D ∝ ∈rE. The flux density is the same.

    Since ∈r has become 10 times, E decreases by 10 times.

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