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  3. CET Karnataka Engineering

CET Karnataka Engineering CET - Karnataka Engineering Solved Paper-2005

  • question_answer
    The disc of a siren containing 60 holes rotates at a constant speed of 360 rpm. The emitted sound is in unison with a tuning fork of frequency:

    A)  10 Hz                                   

    B)  360 Hz

    C)  216 Hz                                 

    D)  60 Hz

    Correct Answer: B

    Solution :

    Speed = 360 revolutions per min                 \[=\frac{360}{60}\] revolutions per sec                 = 6 Frequency \[=6\times 60\]                 = 360


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