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  1. In a radar system, the range of R1 is achieved at a frequency f1. Then the range R2 at frequency R2 = 8f1 would be __________ [Neglect effect of 1 on the Beam width.]

    2. A.
    R2 = R1
    B.
    R2 = 4R1
    C.
    R2 = 2R1
    D.
    R2 =

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    Answer : Option C

    Explanation :

    The range of the radar is directly proportional to the square root of the frequency.

    ∴ R ∝

    ∴ R1 ∝

    and R2 ∝

    ∴

    ∴ .

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