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

  • question_answer
    The total power content of an AM wave is 1500 W. For 100% modulation, the power transmitted by the carrier is

    A)            500 W                                      

    B)            700 W

    C)            750 W                                      

    D)            1000 W

    Correct Answer: D

    Solution :

                       \[\frac{{{P}_{t}}}{{{P}_{c}}}=1+\frac{{{m}^{2}}}{2}\] or \[{{P}_{c}}={{P}_{t}}\left[ \frac{2}{2+{{m}^{2}}} \right]\] \ \[{{P}_{c}}=1500\,\left[ \frac{2}{2+1} \right]\]   Q m = 100% = 1 = 1000 W


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