JEE Main & Advanced Sample Paper JEE Main - Mock Test - 23

  • question_answer
    In the given detector circuit, the suitable value of carrier frequency is

    A) \[<<{{10}^{9}}Hz\]   

    B)        \[<<{{10}^{5}}Hz\]

    C) \[>>{{10}^{9}}Hz\]   

    D)        None of these

    Correct Answer: A

    Solution :

    [a] Using \[\frac{1}{{{f}_{carrier}}}<<RC\] We get time constant, \[RC=1000\times {{10}^{-12}}={{10}^{-9}}s\] Now \[v=\frac{1}{T}=\frac{1}{{{10}^{-9}}}={{10}^{9}}Hz\] Thus the value of carrier frequency should be much less than \[{{10}^{9}}Hz,\] say\[100kHz\].

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