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

  • question_answer
    An AM wave has 1800 watt of total power content, For 100% modulation the carrier should have power content equal to

    A)            1000 watt                              

    B)            1200 watt

    C)            1500 watt                              

    D)            1600 watt

    Correct Answer: B

    Solution :

     \[{{P}_{t}}={{P}_{c}}\left( 1+\frac{m_{a}^{2}}{2} \right)\,;\] Here ma = 1 Þ \[1800={{P}_{c}}\left( 1+\frac{{{(1)}^{2}}}{2} \right)\] Þ \[{{P}_{c}}=1200W\]


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