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Uttarakhand PMT Uttarakhand PMT Solved Paper-2005

  • question_answer
    A resonance air column of length 17.4 cm resonates with a tuning fork of frequency 512 Hz. The speed of sound in air is :

    A)  356 m/s          

    B)  330 m/s

    C)  343 m/s          

    D)  372 m/s

    Correct Answer: A

    Solution :

     Here: Length of air column \[l=17.4\text{ }cm\] The frequency of fork \[v=512\text{ }Hz\] Speed of sound in air is \[\upsilon =4\text{ }v\text{ }l\] \[=4\times 512\times 0.174\] \[\approx 356\text{ }m/s\]


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