NEET
- Exam
- NEET
- Subject
- Physics
- Chapter
- Waves and Sound
NEET · Physics · Waves and Sound
The figure below shows pressure variation in two different sound...
The figure below shows pressure variation in two different sound waves in air with time at a given position. Both the figures are drawn to the same scale.
Which of the following statements is true?
Which of the following statements is true?
Options
- AWave 1 has lower frequency and smaller amplitude compared to wave 2
- BWave 1 has higher frequency and greater amplitude compared to wave 2
- CWave 1 has shroter wavelength and greater amplitude compared to wave 2
- DWave 1 has shorter wavelength and smaller amplitude compared to wave 2
Correct answer
D. Wave 1 has shorter wavelength and smaller amplitude compared to wave 2
Step-by-step solution
Reason (brief):
- The graphs are vs at a fixed position and same scale.
- Wave 1 shows more oscillations in the same time (\Rightarrow) higher frequency than Wave 2.
- In the same medium, wave speed is the same, so (v=f \lambda \Rightarrow \lambda=\frac{v}{f}). Hence higher (Wave 1) (\Rightarrow) smaller (\lambda).
- The peak displacement from the mean (pressure amplitude) is smaller for Wave 1 than for Wave 2. Therefore, Wave 1: shorter wavelength and smaller amplitude (\rightarrow) option (4).