Free Progressive Waves MCQs with Answers
72 Progressive 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 a medium or space while particles oscillate about their equilibrium positions. The work includes amplitude, wavelength, frequency, period, phase difference, wave speed and the progressive wave equation, while distinguishing travelling waves from stationary waves, where the pattern has fixed nodes and antinodes.
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- A. 8/15 m
- B. 15/8 m
- C. 8/15 cm
- D. 15/8 cm
Explanation: Given that; Phase angle = ∆Φ = 3π/4. ∆d = 20 cm which is 0.2m, ∆Φ = k∆d, where k is wave number k = 2π/λ. ∆Φ = (2π/λ)(∆d).
Correct answer: 8/15 m- A. 10 cm
- B. 20 cm
- C. 30 cm
- D. 40 cm
Explanation: Phase difference = 2(PI)/ lambda x path difference Where , Phase difference = (PI)/3 Path difference = 5 The equation becomes , (pi)/3 =…
Correct answer: 30 cm- A. λ/2
- B. 3λ/2
- C. 5λ/2
- D. λ/4
Explanation: Path difference = wavelength/2π x phase differenceΔx = λ/2π × π/2 = λ/4 hence Option D is the correct answer.
Correct answer: λ/444. Time period of the wave is 1/4 sec. How long does it take to pass 20 complete waves from a point?
- A. 5 sec
- B. 80 sec
- C. 1/80 sec
- D. 1/5 sec
Explanation: Time taken by 1 wave = ¼ sec Time taken by 20 waves = x sec x = 20 (¼) = 20/4 x = 5 sec The time taken by 20 waves is 5 s.
Correct answer: 5 sec- A. 10.5cm
- B. 3cm
- C. 13cm
- D. 10cm
Explanation: We know, wavelength is the minimum separation between two successive crests or troughs of a wave.relation between phase difference, path…
Correct answer: 10cm- A. 5/4 m
- B. 4pi m
- C. 2m
- D. 10m
Explanation: SOLVE AS follows: Given that the phase difference is 5, For the minimum difference in length between the points, assume they lie within…
Correct answer: 2m- A. 30 cm
- B. 45 cm
- C. 5 cm
- D. 10 cm
Explanation: According to the formula of Phase Difference ΔΦ=Δx(2pi/λ) where, ΔΦ = phase difference ( phase angle between two points ) λ = wavelength…
Correct answer: 10 cm- A. Displacement of medium = parallel to the energy transfer direction of propagation of wave = parallel to the energy transfer.
- B. Displacement of medium = parallel to the energy transfer direction of propagation of wave = perpendicular to the energy transfer
- C. Displacement of medium = perpendicular to the energy transfer direction of propagation of wave = parallel to the energy transfer.
- D. Displacement of medium = perpendicular to the energy transfer direction of propagation of wave = perpendicular to the energy transfer.
Explanation: Option A is correct since it mentions the characteristics of a longitudinal wave.Option B is incorrect since it mentions the…
Correct answer: Displacement of medium = parallel to the energy transfer direction of propagation of wave = parallel to the energy transfer.- A. 45 cm
- B. 5 cm
- C. 1/5 cm
- D. 1/3 cm
Explanation: The distance between 2nd and 5th crest is 15 cmGoing from the 2nd to the 5th crest, there are 3 wavelengths.Using a simple ratio method:15…
Correct answer: 5 cm- A. Period
- B. Frequency
- C. Amplitude
- D. Wavelength
Explanation: Option B is correct since the number of vibrations per second is known as the frequency, measured in Hertz (1 Hz = 1 vibration per second).
Correct answer: Frequency- A. 2a
- B. a/2
- C. 2λ
- D. λ/2
Explanation: The distance between a crest and a consecutive trough is half of the wavelength.
Correct answer: λ/2- A. Wavelength
- B. Amplitude
- C. Displacement
- D. None of these
Explanation: Correct Option:AIn a periodic wave, the distance between two consecutive crests (or two consecutive troughs) is known as the wavelength.
Correct answer: Wavelength- A. 2π
- B. 2.5π
- C. 3π
- D. 1π
Explanation: Correct Option: BThe formula we know thatΔΦ=2π X distance /λΔΦ= 2π x 25cm/20cmΔΦ = 2π x 1.25ΔΦ = 2.5πThus this is the correct option.
Correct answer: 2.5π- A. π
- B. 2π
- C. 3π
- D. 3π/4
Explanation: The phase angle between two points on a wave can be calculated using the formula: phase angle = (2π/λ) * (distance between the two points)…
Correct answer: 2π- A. 2 Hz
- B. 20 Hz
- C. 4 Hz
- D. 40 Hz
Explanation: Frequency is the number of cycles/oscillations per second. Therefore f = 100/5 = 20 Hz. Hence Option B is correct.
Correct answer: 20 Hz- A. 00
- B. 450
- C. 900
- D. 1800
Explanation: λ= 0.20m.Phase difference= 0.65mNearest integral multiple of wavelength to phase difference= 0.20 x 3= 0.60mNet phase difference = 0.65 -…
Correct answer: 900- A. Bounces back such that the direction of its displacement remains same
- B. Bounces back such that the direction of its displacement is reversed
- C. Travels into second medium and the direction of its displacement is reversed
- D. Travels into second medium and the direction of its displacement remains same
Explanation: When a transverse wave, traveling in a rarer medium, encounters a denser medium, it undergoes reflection.
Correct answer: Bounces back such that the direction of its displacement is reversed- A. Metals
- B. Solids
- C. Fluids
- D. Soil
Explanation: For transverse waves the displacement of the medium is perpendicular to the direction of propagation of the wave.Transverse waves cannot…
Correct answer: Fluids- A. Doppler Effect
- B. Beats
- C. Interference
- D. All of the above
Explanation: Explanation:The Doppler effect is the phenomenon where the frequency of a wave (such as light or sound) appears to change when the source…
Correct answer: Doppler Effect60. The information received at the other end of a fibre can be inaccurate due to of the light signal.
- A. Longer wavelengths
- B. Frequency
- C. Intensity
- D. Dispersion or Spreading
Explanation: Explanation:Dispersion is a phenomenon in which the different wavelengths of light travel at different speeds through a fibre, causing the…
Correct answer: Dispersion or Spreading