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    Find out the 7th harmonic frequency if fundamental frequency is 20 Hz.
    Question

    Find out the 7th harmonic frequency if fundamental frequency is 20 Hz.

    A.

    140Hz

    B.

    20Hz

    C.

    10Hz

    D.

    50HZ

    Correct option is A



    The harmonic frequencies are integer multiples of the fundamental frequency. The nth harmonic frequency is given by:

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