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JIPMER 2018
Exam
JIPMER
Year
2018
Subject
Physics
Chapter
Waves and Sound

JIPMER 2018 · Physics · Waves and Sound

If speed of sound in air is 340 ~m / s and in water is 1480 ~m / s...

If speed of sound in air is 340 m/s340 \mathrm{~m} / \mathrm{s} and in water is 1480 m/s1480 \mathrm{~m} / \mathrm{s}. If frequency of sound is 1000 kHz, then find wavelength in water

Options

  1. A2.96mm2.96 mm
  2. B2.96mm2.96 mm
  3. C1.48mm1.48 mm
  4. D0.74mm0.74 mm

Correct answer

B. 2.96mm2.96 mm

Step-by-step solution

Given that, vw=1480 m/s,f=1000kHz\mathrm{v}_{\mathrm{w}}=1480 \mathrm{~m} / \mathrm{s}, \mathrm{f}=1000 \mathrm{kHz} Speed, vw=fλ\mathrm{v}_{\mathrm{w}}=\mathrm{f} \lambda ∴λ=vwf=14801000×103=1.480 mm\therefore \quad \lambda=\frac{\mathrm{v}_{\mathrm{w}}}{\mathrm{f}}=\frac{1480}{1000 \times 10^3}=1.480 \mathrm{~mm}
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