Two identical flutes produce fundamental notes of frequency 300 Hz at 27 $^{o}$ C. If the temperature of the air in one flute is increased to 31 $^{o}$ C, the number of beats heard per second will be :

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Solution

The correct option is C 2
$v = \sqrt{\frac{r R T}{M}}$
$f \propto \sqrt{T}$
$∴ \frac{f_{1}}{f_{2}} = \sqrt{\frac{300}{304}} f_{2} = 302 H z$
$∴$ No. of beats $= f_{2} - f_{1} = 2 H z$

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Two identical flutes produce fundamental notes of frequency 300 Hz at 27oC. If the temperature of the air in one flute is increased to 31oC, the number of beats heard per second will be :

The correct option is C 2v=√rRTMf∝√T∴f1f2=√300304f2=302Hz∴ No. of beats =f2−f1=2 Hz

Two identical flutes produce fundamental notes of frequency 300 Hz at 27 $^{o}$ C. If the temperature of the air in one flute is increased to 31 $^{o}$ C, the number of beats heard per second will be :

The correct option is C 2
$v = \sqrt{\frac{r R T}{M}}$
$f \propto \sqrt{T}$
$∴ \frac{f_{1}}{f_{2}} = \sqrt{\frac{300}{304}} f_{2} = 302 H z$
$∴$ No. of beats $= f_{2} - f_{1} = 2 H z$