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JEE Main & Advanced Physics Communication System / संचार तंत्र Question Bank Self Evaluation Test - Communication System

  • question_answer
    An oscillator is producing FM waves of frequency \[2\text{ }kHz\] with a variation of\[10\text{ }kHz\]. What is the modulating index?

    A) 5

    B) 4    

    C) 3

    D) 2

    Correct Answer: A

    Solution :

    [a] The formula for modulating index is given by \[{{m}_{f}}=\frac{\delta }{{{v}_{m}}}=\frac{Frequency\,\,deviation}{Modulating\text{ }frequency~}=\frac{10\times {{10}^{3}}}{2\times {{10}^{3}}}=5\]


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