Free Waves MCQs with Answers
1,281 Waves MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.
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- A. N-f
- B. N/f
- C. N*f
- D. N+f
Explanation: When two tuning forks with slightly different frequencies are sounded together, they produce beats, which are periodic variations in sound…
Correct answer: N+f- A. v/4
- B. 4v
- C. v/2
- D. 2v
Explanation: Since the root-mean-square of velocity tells us about the mean velocity of molecules, we can relate the speed of a molecule with another.
Correct answer: 4v- A. The energy stored is completely kinetic
- B. The energy stored is completely potential
- C. The energy stored is kinetic and potential
- D. The energy stored is wholly chemical
Explanation: In the case of Simple Harmonic Motion, displacement is inversely proportional to velocity.
Correct answer: The energy stored is completely potential- A. m
- B. m3
- C. m/s
- D. m/s2
Explanation: The SI unit of wavelength is metre usually denoted as m. While measuring wavelength the multiples or fractions of a metre is also used.
Correct answer: m- A. Doppler's effect
- B. Magnetic effect
- C. Mechanical effect
- D. Electrical effect
Explanation: Doppler Effect refers to the change in wave frequency during the relative motion between a wave source and its observer.
Correct answer: Doppler's effect- A. 1 wavelength
- B. 3/4 wavelength
- C. 1/2 wavelength
- D. 3/2 wavelength
Explanation: The correct answer is 1/2 wavelength. In a stationary wave, the distance between two consecutive crests is defined as half of a full…
Correct answer: 1/2 wavelength- A. Beats
- B. Standing waves
- C. Diffraction
- D. None of these options are correct
Explanation: OPTION A: The periodic motion in the loudness of sound which is heard when two notes of nearly the same frequency are played…
Correct answer: Standing waves- A. Interference
- B. Diffraction
- C. Beats
- D. Stationary waves
Explanation: OPTION A: When two waves having the same frequency, amplitude, and a constant phase relationship are propagating through a certain region…
Correct answer: Interference- A. One wavelength
- B. Two wavelengths
- C. Radius
- D. Diameter
Explanation: The correct answer is Option A: One wavelength. The distance between consecutive wavefronts in a wave is defined as one wavelength, which…
Correct answer: One wavelength- A. f2-f1
- B. f2 * fl
- C. f1 - f2
- D. f2 + f1
Explanation: The number of beats produced in one second when two tuning forks with frequencies f1 and f2 (where f1 < f2) are sounded together can be…
Correct answer: f2-f1- A. Frequency decreases wavelength decreases
- B. Frequency increases and wavelength decreases
- C. Frequency does not change as wavelength decreases
- D. The frequency does not change wavelength does not change
Explanation: The wavelength of the sound wave decreases. The frequency of the sound wave stays the same.
Correct answer: Frequency does not change as wavelength decreases- A. Waves transport energy and matter
- B. Waves transport energy without transporting matter
- C. Waves transport matter but not energy
- D. Waves do not transport matter or energy
Explanation: A wave transports its energy without transporting matter. Waves are seen moving through an ocean or lake, yet the water always returns to…
Correct answer: Waves transport energy without transporting matter- A. ML-2
- B. ML-1
- C. M
- D. ML
Explanation: In this equation, 'm' represents mass per unit length, so the correct dimension is [ML‐1]
Correct answer: ML-1- A. One wavelength
- B. 2.5 wavelength
- C. 3 wavelength
- D. Half wavelength
Explanation: In this picture , we can clearly see that distance between two consecutive nodes is half-wavelength in a stationary wave.
Correct answer: Half wavelength- A. Tension of the string
- B. Tension and mass per unit length of the string
- C. Diameter of the string
- D. Mass per unit length of the string
Explanation: The speed of wave in string depends upon Tension in string and Linear Density of string, (Linear Density = mass / length) so option B is…
Correct answer: Tension and mass per unit length of the string- A. Matter waves
- B. Mechanical waves
- C. Electromagnetic waves
- D. Microwaves
Explanation: Mechanical waves require a medium for propagation. e.g. sound waves, string waves, etc.Matter waves describe the relationship b/w momentum…
Correct answer: Mechanical waves- A. Equal to one wavelength
- B. Equal to two wavelength
- C. Equal to half of wavelength
- D. Equal to quarter of wavelength
Explanation: Nodes and antinodes are known to form stationary waves. In a given stationary wave, the distance between any given two successive nodes is…
Correct answer: Equal to half of wavelength- A. Speed of sound
- B. Wavelength of sound
- C. Speed of light
- D. Wavelength of light
Explanation: Michelson's Interferometer uses the phenomena of interference to measure the wavelength of light from a source.
Correct answer: Wavelength of light- A. 4.5 x 10^9 Pa
- B. 45 x 10^6 Pa
- C. 4.5 x 10^8 Pa
- D. 5 x 10^6 Pa
Explanation: Given: Speed of sound =1830m/sDensity = 1.35 g/cm³. = 1350 kg/m3 (To convert g/cm3 to kg/m3 we multiply the value with 1000)Required…
Correct answer: 4.5 x 10^9 Pa- A. 1500 m/s
- B. 5000 m/s
- C. 330 m/s
- D. 50 m/s
Explanation: The speed of sound in air depends on several factors, such as temperature, humidity, and air pressure.
Correct answer: 330 m/s