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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1,281 questions · page 29 of 65
- A. 30 m
- B. 40 m
- C. 50 m
- D. 15 m
Explanation: The distance between two successive crests or troughs is the wavelength (λ).
Correct answer: 30 m- A. 20/3 m
- B. 20x3 m
- C. 3/20 m
- D. 2/3 m
Explanation: The following is the solution:We know that speed of a travelling wave = frequency x wavelengthfrom here:wavelength = speed /…
Correct answer: 3/20 m- A. 1.22V1
- B. 0.61v
- C. 1.50v
- D. 0.75v
Explanation: Speed of sound V= square root (T/M)Where m is the mass per unit lengthFrom here we can see that V is proportional to square root (T)Also…
Correct answer: 1.22V1- A. Velocity
- B. Frequency
- C. Wavelength
- D. Phase
Explanation: The frequency of a wave remains constant as it moves from one medium to another.
Correct answer: Frequency- A. Longitudinal wave
- B. Transverse wave
- C. Material wave
- D. Particle wave
Explanation: The correct answer is Longitudinal wave because shock waves, such as those produced during an earthquake, cause the particles in the…
Correct answer: Longitudinal wave- A. Momentum ; standing
- B. Energy ; standing
- C. Energy ; progressive
- D. Momentum ; progressive
Explanation: Progressive waves are waves that carry energy away from the source as they propagate through a medium.
Correct answer: Energy ; progressive- A. Electric waves
- B. Magnetic waves
- C. Electromagnetic waves
- D. Sound waves
- E. Earthquake's shock waves
Explanation: Electromagnetic waves do not require a medium for travel since they are not transmitted by the vibration of particles.
Correct answer: Electromagnetic waves- A. 1m
- B. 2m
- C. 3m
- D. 4m
- E. 5m
Explanation: λ The speed of a wave v is related to its frequency f and wavelength λ by the formula: v = fλIn this case, the speed of sound v through…
Correct answer: 1m- A. Interference
- B. Reflection
- C. Diffraction
- D. Polarization
Explanation: In a transverse wave, the oscillations of the particles occur perpendicular to the direction of wave propagation.
Correct answer: Polarization570. Astronomers calculate speed of distant stars and galaxies using which of the following phenomena:
- A. Beats
- B. Interference
- C. Superposition principle
- D. Doppler effect
Explanation: The Doppler effect is a phenomenon where the observed frequency of a wave changes depending on the relative motion between the source of…
Correct answer: Doppler effect- A. 0.5 ms-1
- B. 1 ms-1
- C. 1.5 ms-1
- D. 2 ms-1
Explanation: Use the formula "v=fλ"As it is known that 40 waves pass through the point in 1 second so frequency is 40.Wavelength is 5cm which can be…
Correct answer: 2 ms-1- A. Joule per second
- B. Watt per metre square
- C. Watt metre square
- D. Joule per metre square
- E. Joule metre
Explanation: Intensity is the amount of sound power passing through a unit area, and is measured in watts per square meter (W/m²).
Correct answer: Watt per metre square- A. Less than either of the individual waves
- B. Greater than either of the individual waves
- C. Equal to the shortest of the individual waves
- D. Equal to the greatest of the individual waves
Explanation: Option A: The amplitude of the resulting wave can never be less than either of the individual waves.
Correct answer: Greater than either of the individual waves- A. V = √(B / P)
- B. V = √(B * P)
- C. V = B / P
- D. V = √(P / B)
Explanation: The speed of sound in a compressible medium is given by Newton's formula: V = √(B / P), where B is the bulk modulus and P is the density…
Correct answer: V = √(B / P)- A. Increases ... decreases
- B. Increases ... remains same
- C. Decreases ... increases
- D. Decreases ... remains same
Explanation: The correct answer is that the pitch of the sound decreases when the train is moving away and increases when the train is approaching.
Correct answer: Decreases ... increases- A. 5 sec
- B. 80 sec
- C. 1/80 sec
- D. 1/5 sec
Explanation: f = 1/Tf = 4 HzHence, 4 waves pass a point in 1 second.20 waves will pass a point in x secondsx = 20/4x = 5 seconds
Correct answer: 5 sec- A. 45 cm
- B. 5 cm
- C. 1/5 cm
- D. 1/3 cm
Explanation: The following is the solution:Wavelength can be defined as the distance between successive crests.
Correct answer: 5 cm- A. 1 wavelength
- B. 1.5 wavelength
- C. 0.5 wavelength
- D. 2.5 wavelength
Explanation: The following is the solution:For two points to be in phase, the distance between them should be nλ where n is a whole number.
Correct answer: 1 wavelength- A. 1/4 sec
- B. 4 sec
- C. 1/2 sec
- D. 2 sec
Explanation: The following is the solution:If it takes 5 seconds for 20 waves to passthen the time taken for one wave to pass will be xUsing simple…
Correct answer: 1/4 sec- A. 8 cm
- B. 9 cm
- C. 1 cm
- D. 12 cm
Explanation: The phase difference between two points on a wave is given by: Δφ = 2πΔd/λ where Δd is the distance between the two points and λ is the…
Correct answer: 8 cm