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14. waves and sound — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics14. waves and sound1 Mark
MCQ
An open pipe resonates with a tuning fork of frequency $500 Hz$. it is observed that two successive nodes are formed at distances $16$ and $46 cm $ from the open end. The speed of sound in air in the pipe is ..... $m/s$
  • A
    $230$
  • ✓
    $300$
  • C
    $320$
  • D
    $360$
✓

Answer

Correct option: B.
$300$
b
(b) Distance between two consecutive nodes

$ = \frac{\lambda }{2} = 46 - 16 = 30$

$ \Rightarrow \lambda = 60\,cm = 0.6m$

$\therefore $ $v = n\lambda = 500 \times 0.6 = 300$$m/s$.

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