Waves is an important topic in the Physics section in TS EAMCET exam. Practising this topic will increase your score overall and make your conceptual grip on TS EAMCET exam stronger.
This article gives you a full set of TS EAMCET PYQs for Waves with explanations for effective preparation. Practice of TS EAMCET Physics PYQs including Waves questions regularly will improve accuracy, speed, and confidence in the TS EAMCET 2026 exam.
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TS EAMCET PYQs for Waves with Solutions
1.
A prism having angle \(\theta\) and refractive index of the material of prism ‘n’ are related by \[ \theta = 2\sin^{-1} \left( \frac{1}{\sqrt{n^2 + 1}} \right) \] - If the angle of minimum deviation is \(60^\circ\), then the angle of the prism is- \(54^\circ\)
- \(60^\circ\)
- \(30^\circ\)
- \(45^\circ\)
2.
The frequency of sound heard by a stationary observer is \( f_1 \), when the source of sound is approaching the observer with a speed of 10% of the speed of sound. If the same source of sound is moving away from the stationary observer with a speed of 20% of the speed of sound, the frequency of sound heard by the observer is \( f_2 \). Then \( f_1 : f_2 \) is:- \( 1:2 \)
- \( 9:11 \)
- \( 4:3 \)
- \( 1:1 \)
3.
The successive frequencies produced by an organ pipe are 330 Hz, 440 Hz and 550 Hz. If the speed of sound in air is 330 m/s then the length of the organ pipe is- 3 m
- 1.5 m
- 2 m
- 0.75 m
4.
A source at rest emits sound waves of frequency \( 102 \) Hz. Two observers are moving away from the source of sound in opposite directions each with a speed of \( 10\% \) of the speed of sound. The ratio of the frequencies of sound heard by the observers is?- \( 9:11 \)
- \( 1:1 \)
- \( 7:9 \)
\( 2:3 \)
5.
A wire under a tension of 144 N vibrating in its fundamental mode gives 5 beats per second with a tuning fork. When the tension applied to the wire is increased to 169 N, the number of beats heard per second remains the same. The frequency of the tuning fork is- 125 Hz
- 60 Hz
- 65 Hz
- 55 Hz
6.
A polaroid sheet ‘P’ is placed on another similar polaroid sheet ‘Q’ such that the angle between their axes is \(45^\circ\). - The ratio of the intensities of the light emerged from polaroid ‘Q’ and the unpolarised light incident on polaroid ‘P’ is- \(1:4\)
- \(1:2\)
- \(1:\sqrt{3}\)
- \(1:\sqrt{2}\)
7.
A sound wave of frequency 210 Hz travels with a speed of 330 ms⁻¹ along the positive x-axis. Each particle of the wave moves a distance of 10 cm between the two extreme points. The equation of the displacement function (s) of this wave is (x in metre, t in second)- \(s(x,t) = 0.10 \sin[4x - 1320t]\) m
- \(s(x,t) = 0.05 \sin[4x - 1320t]\) m
- \(s(x,t) = 0.05 \sin[1320x - 4t]\) m
- \(s(x,t) = 0.10 \sin[1320x - 4t]\) m
8.
If the tension applied to a string is decreased by 36%, then the fundamental frequency of the transverse waves of the string is:- Increases by 10%
- Decreases by 10%
- Increases by 20%
- Decreases by 20%
9.
In a medium, a source produces 60 crests and 60 troughs in a time of 0.2 s. If the distance between a crest and its adjacent trough is 100 cm, then the speed of sound in the medium is:- $600\ \mathrm{m\,s^{-1}}$
- $1200\ \mathrm{m\,s^{-1}}$
- $300\ \mathrm{m\,s^{-1}}$
- $200\ \mathrm{m\,s^{-1}}$
10.
The path difference between two particles of a sound wave is \( 50 \) cm and the phase difference between them is \( 1.8\pi \). If the speed of sound in air is \( 340 \) m/s, the frequency of the sound wave is?- \( 672 \) Hz
- \( 306 \) Hz
- \( 612 \) Hz
\( 340 \) Hz
11.
An observer moves towards a source at rest with a speed of 25% of the speed of sound in air. If the frequency of the sound emitted by the source is 200 Hz, then the frequency of sound heard by the observer is:- $275\ \mathrm{Hz}$
- $300\ \mathrm{Hz}$
- $250\ \mathrm{Hz}$
- $325\ \mathrm{Hz}$
12.
The frequency of sound heard by a stationary observer is \( f_1 \), when the source of sound is approaching the observer with a speed of 10\% of the speed of sound. If the same source of sound is moving away from the stationary observer with a speed of 20\% of the speed of sound, the frequency of sound heard by the observer is \( f_2 \). Then \( f_1 : f_2 \) is:- \( 1:2 \)
- \( 9:11 \)
- \( 4:3 \)
- \( 1:1 \)
13.
Wave picture of light has failed to explain
(1) photoelectric effect
(2) interference of light
(3) diffraction of light
(4) polarization of lightphotoelectric effect
interference of light
diffraction of light
polarization of light
14.
A string vibrates in its fundamental mode when a tension \(T_1\) is applied to it. If the length of the string is decreased by 25% and the tension applied is changed to \(T_2\), the fundamental frequency of the string increases by 100%, then \(\frac{T_2}{T_1}=\)- \(\frac{3}{8}\)
- \(\frac{2}{3}\)
- \(\frac{8}{9}\)
- \(\frac{9}{4}\)
15.
If the tension applied to a string is decreased by 36\%, then the fundamental frequency of the transverse waves of the string is:- Increases by 10\%
- Decreases by 10\%
- Increases by 20\%
- Decreases by 20\%
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