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  1. A short grounded vertical antenna has a length L which is 0.05λ at frequency f. If its radiation resistance at f is R ohms, then its radiation resistance at a frequency 2f will be

    2. A.
    R/2Ω
    B.
    RΩ
    C.
    2RΩ
    D.
    4RΩ

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    Answer : Option D

    Explanation :

    Rr = 80p2

    ∴ Rr ∝ f2.

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