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Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveBeatsEasy2 minPYQ_2020

PhysicsEasysingle choice

The frequency of two tuning forks $A$ and $B$ are $1 \cdot 5%$ more and $2 \cdot 5%$ less than that of the tuning fork $C$ . When $A$ and $B$ are sounded together, 12 beats are produced in 1 second. The frequency of tuning fork $C$ is

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Solution:

$f_{A} = f_{c} \times 1.015 f_{B} = f_{c} \times 0.975$ $f_{A} - f_{B} = 12$ $(1.015 - 0.975) f_{c} = 12$ $0.040 f_{c} = 12$ $∴ f = \frac{12}{0.040} = 300 Hz$

Stream:MHT_CETSubject:PhysicsTopic:Sound WaveSubtopic:Beats

⏱ 2mℹ️ Source: PYQ_2020

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