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.
91
What is the number of vibrations of a sound wave per unit time called?
✓ Answer:DFrequency
Frequency is the number of complete oscillations per unit time, measured in hertz for oscillations per second.
92
A wave has wavelength 2.5 m and frequency 400 Hz. Find its velocity.
RRB Group-D
06/12/2018 (Shift-II)
2018
✓ Answer:C1000 m/s
v = fλ = 400 × 2.5 = 1000 m/s.
93
The amplitude of a wave is:
RRB Group-D
06/12/2018 (Shift-III)
2018
✓ Answer:BMaximum displacement of medium particles on either side of the equilibrium position
Amplitude is the maximum magnitude of displacement from equilibrium.
94
A wave produces 40 crests and 40 troughs in 0.3 s. Find its frequency.
RRB Group-D
27/11/2018 (Shift-III)
2018
✓ Answer:C133.33 Hz
Each crest-trough pair represents one cycle. Thus f = 40/0.3 ≈ 133.33 Hz.
95
What is a region of high particle density during sound transmission called?
RRB Group-D
16/11/2018 (Shift-I)
2018
✓ Answer:BCompression
A compression is a region where particles are closer together and pressure is relatively high.
96
If the distance between a crest and the next trough in a wave representation is L, what is the wavelength?
RRB Group-D
16/11/2018 (Shift-I)
2018
✓ Answer:B2L
A crest and its adjacent trough are separated by half a wavelength, so λ = 2L.
97
Which wave has the longest wavelength?
RRB Group-D
01/12/2018 (Shift-II)
2018
✓ Answer:AA wave of frequency 100 Hz
For waves travelling at the same speed, the lowest frequency corresponds to the longest wavelength.
98
A source produces 20 crests and 20 troughs in 0.4 s. Find its frequency.
RRB Group-D
03/12/2018 (Shift-II)
2018
✓ Answer:D50 Hz
There are 20 complete cycles in 0.4 s. Therefore f = 20/0.4 = 50 Hz.
99
A source of frequency 500 Hz emits waves of wavelength 0.4 m. How long do the waves take to travel 600 m?
RRB Group-D
05/12/2018 (Shift-III)
2018
✓ Answer:C3 s
v = fλ = 500 × 0.4 = 200 m/s. Hence t = 600/200 = 3 s.
100
The depth of a wave's trough below equilibrium is called its:
RRB Group-D
15/11/2018 (Shift-III)
2018
✓ Answer:DAmplitude
The maximum displacement below equilibrium has a magnitude equal to the amplitude.
Showing 91 – 100 of 215 MCQ Questions | Page 10 of 22
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
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