Practice Sound RRB PYQ questions asked in various Railway Recruitment Board examinations. This page provides important previous year questions from the Sound chapter along with correct answers and clear explanations to help you prepare effectively for RRB Physics.
The Sound chapter covers important concepts such as the nature of sound waves, frequency range of sound waves, speed of sound, characteristics of sound, echo, SONAR and RADAR. These concepts are important for understanding the types of Physics questions commonly asked in Railway examinations.
Start practicing Sound RRB PYQs with answers and explanations and strengthen your Railway Physics preparation.
71
If the frequency of a wave increases, what happens to its wavelength?
RRB NTPC (Stage-I)
28/03/2016 (Shift-I)
2016
✓ Answer:CIt decreases
For constant wave speed, λ = v/f, so wavelength decreases as frequency increases.
72
What is the relation between wave velocity v, frequency f and wavelength λ?
Wave speed is the product of frequency and wavelength: v = fλ.
73
Match electromagnetic waves with uses. P: Radio waves; Q: Microwaves; R: Infrared rays; S: Gamma rays. (i) Household electronic remote controls; (ii) Aircraft radar/navigation; (iii) Cellular phones; (iv) Destroying cancer cells in medicine. Options list matches for P, Q, R, S.
RRB NTPC (Stage-I)
29/04/2016 (Shift-III)
2016
✓ Answer:C(iii), (ii), (i), (iv)
The intended matches are radio waves with cellular communication, microwaves with radar, infrared with remote controls and gamma rays with cancer treatment.
74
What is the relation between frequency f and time period T?
RRB Group-D; RRB JE
10/12/2018 (Shift-I); 27/05/2019 (Shift-I)
2018; 2019
✓ Answer:DT = 1/f
Frequency and time period are reciprocals: T = 1/f.
75
Rarefaction occurs where air pressure is:
RRB Group-D
16/11/2018 (Shift-II)
2018
✓ Answer:ALow
Rarefaction is a region of lower pressure and lower particle density. The source uses 'dilution' for rarefaction.
76
What is the wavelength of a wave with frequency 840 Hz and speed 380 m/s?
RRB Group-D
04/12/2018 (Shift-II)
2018
✓ Answer:A0.45 m
λ = v/f = 380/840 ≈ 0.45 m.
77
Compression occurs at a place where air pressure is:
RRB Group-D
24/09/2018 (Shift-III)
2018
✓ Answer:DHigh
A compression is a region of relatively high pressure and high density.
78
Wavelength is usually represented by which Greek letter?
RRB Group-D
11/10/2018 (Shift-III)
2018
✓ Answer:BLambda
The conventional symbol for wavelength is the Greek letter lambda, λ.
79
The supplied image shows a prenatal scan produced using ultrasonic waves. What is this imaging technique called?
RRB Group-D
28/11/2018 (Shift-I)
2018
✓ Answer:CUltrasonography
Ultrasonography forms images using reflected high-frequency sound waves.
80
Which statement about sound waves and light waves is correct?
These RRB Sound PYQ questions help you understand the question pattern and important concepts from the Sound chapter. Each question is provided with the correct answer and a clear explanation, making this page useful for both revision and regular practice.
Whether you are preparing for RRB NTPC Sound PYQ, RRB Group D Sound PYQ, RRB JE Sound PYQ, RRB ALP Sound PYQ, or RRB Technician Sound PYQ, practice these previous year questions regularly to strengthen your Physics preparation.
Tags: Sound RRB Physics PYQ, Sound Previous Year Questions, RRB NTPC Sound PYQ, RRB Group D Sound PYQ, RRB JE Sound PYQ, RRB ALP Sound PYQ, RRB Technician Sound PYQ, Sound Questions for Railway Exams, Sound MCQ for RRB Exams, Physics Sound Questions, Sound Waves RRB PYQ
![RRB JE Biology [PYQ FREE PDF] Question and Solved Problem with Solution](https://rrbjepyq.in/wp-content/uploads/2026/10/rrb-je-biology-feature-image-300x169.webp)
