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 56 of 65
- A. Wave front
- B. Wave crest
- C. Wave trough
- D. Wave length
Explanation: The wave crest is the highest point of a transverse wave, above the mean level.
Correct answer: Wave crest1102. 20 waves pass through a point in a medium in 5 seconds. What is the time required to pass one wave?
- A. 1/4 sec
- B. 4 sec
- C. 1/2 sec
- D. 2 sec
Explanation: A. 20/5 gives the frequency (waves per second) and the inverse of this gives the time period for each wave, which is ¼ seconds. f = no.
Correct answer: 1/4 sec- A. 8 cm
- B. 9 cm
- C. 1 cm
- D. 12 cm
Explanation: Δθ= 2π(ΔS)/λ λ = 2π(ΔS)/Δθ = 2π (3* 10-2)/3π/4 = 4*2*10-2 = 8cm
Correct answer: 8 cm- A. Wave length
- B. Amplitude
- C. Displacement
- D. None of these options are correct
Explanation: OPTION A: Distance between two consecutive crests, two consecutive troughs, or any two in-phase points can be labeled as a…
Correct answer: Wave length- 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/41108. 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