Characteristics of a Sound Wave (Amplitude, Frequency, Wavelength) MCQs
Practice Characteristics of a Sound Wave (Amplitude, Frequency, Wavelength) multiple-choice questions from Sound (Class 9 Science) - tap an answer for instant feedback and a step-by-step solution. Practice the full set free on the RankByte app.
Characteristics of a Sound Wave (Amplitude, Frequency, Wavelength)Quiz - Solve & Score
Q1. While a sound engineer listens, a loudspeaker emits a note of frequency 250 Hz whose wavelength measures 1.32 m; what is the speed of the sound?
- A.189.3939 m/s
- B.0.0053 m/s
- C.330 m/s
- D.251.32 m/s
Answer: C. 330 m/s
Wave speed = frequency * wavelength = 250 Hz * 1.32 m = 330 m/s. The speed of a sound wave equals how many waves pass per second times the length of each wave.
Q2. From a buzzer a tone of frequency 340 Hz spreads out with a wavelength of 1 m; at what speed does it propagate?
- A.341 m/s
- B.0.0029 m/s
- C.339 m/s
- D.340 m/s
Answer: D. 340 m/s
Wave speed = frequency * wavelength = 340 Hz * 1 m = 340 m/s. The speed of a sound wave equals how many waves pass per second times the length of each wave.
Q3. Out in the open a bell produces sound at 425 Hz with a wavelength of 0.8 m; what speed does the wave have?
- A.425.8 m/s
- B.340 m/s
- C.0.0019 m/s
- D.531.25 m/s
Answer: B. 340 m/s
Wave speed = frequency * wavelength = 425 Hz * 0.8 m = 340 m/s. The speed of a sound wave equals how many waves pass per second times the length of each wave.
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