JEE Main & Advanced Physics Communication System / संचार तंत्र Question Bank Communication

  • question_answer
    In short wave communication waves of which of the following frequencies will be reflected back by the ionospheric layer, having electron density 1011 per m3  [AIIMS 2003]

    A)            2 MHz

    B)            10 MHz

    C)            12 MHz                                   

    D)            18 MHz

    Correct Answer: A

    Solution :

                 By using \[{{f}_{c}}\approx 9{{({{N}_{\max }})}^{1/2}}\]Þ \[{{f}_{c}}\approx 2\,MHz\]


You need to login to perform this action.
You will be redirected in 3 sec spinner