TS EAMCET · Physics · Waves and Sound
The displacement equations of sound waves produced by two sources are given by \(y_1=5 \sin 400 \pi t\) and \(y_2=\) \(8 \sin 408 \pi t\), where ' \(t\) ' is time in seconds. If the waves are produced simultaneously, the number of beats produced per minute is
- A 4
- B 8
- C 120
- D 240
Answer & Solution
Correct Answer
(D) 240
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & \text { (d) } \mathrm{y}_1=5 \sin 400 \pi \mathrm{t}, \mathrm{y}_2=8 \sin 408 \pi \mathrm{t} \\ & \therefore \quad \omega_1=400 \mathrm{p}, \omega_2=408 \pi \end{aligned}\) \(\therefore \quad\) Number of beats per minute is…
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