MHT CET · Physics · Waves and Sound
Prong of a vibrating tuning fork is in contact with water surface. It produces concentric circular waves on the surface of water. The distance between five consecutive crests is 0.8 m and the velocity of wave on the water surface is \(56 \mathrm{~m} / \mathrm{s}\). The frequency of tuning fork is
- A 256 Hz
- B 280 Hz
- C 341 Hz
- D 512 Hz
Answer & Solution
Correct Answer
(B) 280 Hz
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & \lambda=\frac{\text { Distance between crests }}{\text { No.of crest }-1}=\frac{0.8}{4}=0.2 \mathrm{~m} \\ & \mathrm{v}=\mathrm{n} \lambda \quad \Rightarrow \mathrm{n}=\frac{\mathrm{v}}{\lambda} \\ \therefore \quad & \mathrm{n}=\frac{56}{0.2}=280 \mathrm{~Hz}\end{aligned}\)
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