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

  • question_answer
    The total power content of an AM wave is 900 W. For 100% modulation, the power transmitted by each side band is 

    A)            50 W                                        

    B)            100 W

    C)            150 W                                      

    D)            200 W

    Correct Answer: C

    Solution :

                       \[{{P}_{c}}={{P}_{t}}\,\left[ \frac{2}{2+{{m}^{2}}} \right]=900\,\left[ \frac{2}{2+1} \right]=600W\] Now, \[{{P}_{LSB}}=\frac{{{m}^{2}}}{4}\times {{P}_{c}}=\frac{1}{4}\times 600=150\,W\]


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