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Discussion :: Materials and Components

  1. Which of the following are true for relative dielectric constant?

    1. It is dimensionless.
    2. It is equal to 1 for vacuum.
    3. It is equal to 1 for all substances.

    2. A.
    1 and 2 only
    B.
    2 and 3 only
    C.
    1 and 3 only
    D.
    1, 2 and 3

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    Answer : Option A

    Explanation :

    ∈r has no units and equal to 1 for vacuum. For other substances it has different value.

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