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JIPMER 2004
Exam
JIPMER
Year
2004
Subject
Physics
Chapter
Waves and Sound

JIPMER 2004 · Physics · Waves and Sound

A resonance air column of length 40 cm resonates with a tuning fork...

A resonance air column of length 40 cm resonates with a tuning fork of frequency 450 Hz . Ignoring end correction, the velocity of sound in air will be

Options

  1. A1020 m/s1020 \mathrm{~m} / \mathrm{s}
  2. B920 m/s920 \mathrm{~m} / \mathrm{s}
  3. C820 m/s820 \mathrm{~m} / \mathrm{s}
  4. D720 m/s720 \mathrm{~m} / \mathrm{s}

Correct answer

D. 720 m/s720 \mathrm{~m} / \mathrm{s}

Step-by-step solution

Here : Length of column =40 cm=0.4 m=40 \mathrm{~cm}=0.4 \mathrm{~m} Frequency of tuning fork =450 Hz=450 \mathrm{~Hz} Using the formula n=v4lorn=\frac{v}{4 l} orv=450×4×0.4&=720 m/s\begin{aligned}v & =450 \times 4 \times 0.4 \& =720 \mathrm{~m} / \mathrm{s}\end{aligned}$$
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