2. Solved Papers
  3. BCECE Medical

BCECE Medical BCECE Medical Solved Papers-2002

  • question_answer
    A resonance air column of length 20cm resonates with a tuning fork of frequency 250 Hz. The speed of the air is:

    A)  75 m/s       

    B)  150 m/s

    C)  200 m/s       

    D)  300 m/s

    Correct Answer: C

    Solution :

    If n is the frequency of the note emitted and v the velocity of sound and I the length of air column, then                 \[n=\frac{v}{4l}\] \[\therefore \] \[250=\frac{v}{4l}\] \[\Rightarrow \] \[v=25\times 4\times 0.2=200\,m/s\]


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