NEET Physics / AI question bank / NCERT Class 11 / Oscillations and Waves
Waves: NEET questions with solutions
NEET uses this chapter for reading amplitude, wavelength, frequency and speed from a wave equation, wave speed on a string, Newton's and Laplace's formulas for sound, harmonics of strings and pipes, superposition and beats. Marks are lost by mixing k with ω, giving a closed pipe even harmonics, and treating beat frequency as a sum.
Also called: sound waves · Doppler effect · standing waves · beats
Questions
10 questions / answers after you pick
- Q1A wave on a string is described by y(x, t) = 0.05 sin(20x − 400t), with x and y in metres and t in seconds. The speed of the wave is
Displacement relation of a progressive waveEasySingle correct
- Q2Sound travels through air only as compressions and rarefactions. Judge whether the Assertion (A) about transverse mechanical waves in gases…
Transverse and longitudinal wavesEasyAssertion–Reason
- Q3Two sound sources of equal amplitude, with frequencies 340 Hz and 336 Hz, are sounded together. What are the beat frequency and the…
BeatsEasySingle correct
- Q4A string of length 1.25 m and mass 5.0 g is stretched with a tension of 100 N. The speed of transverse waves on it is about
Wave speed on a stretched stringMediumSingle correct
- Q5A pipe 0.85 m long is closed at one end and open at the other. The speed of sound in air is 340 m s⁻¹. Which of the following frequencies…
Harmonics of strings and pipesMediumSingle correct
- Q6A gas has density 1.25 kg m⁻³ at a pressure of 1.0 × 10⁵ Pa, and its ratio of specific heats is γ = 1.4. Using Laplace's formula, the speed…
Speed of sound: Newton and LaplaceMediumSingle correct
- Q7A string 1.5 m long, fixed at both ends, vibrates in a standing-wave pattern with three loops (two nodes between the ends). The speed of…
Reflection and standing wavesMediumSingle correct
- Q8For each system in List I, the length is L and the wave speed is v. Match each with its frequency in List II.
Harmonics of strings and pipesMediumMatch the following
- Q9A guitar string sounded with a 300 Hz tuning fork gives 4 beats per second. When the tension in the string is slightly reduced, the beats…
BeatsHardSingle correct
- Q10Two waves y₁ = a sin(kx − ωt) and y₂ = a sin(kx − ωt + 2π/3) travel along the same string. The amplitude of the resultant wave is
Principle of superpositionHardSingle correct
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