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 41 of 65
- A. V is directly related to temperature
- B. V is directly related to square root of temperature
- C. V is directly related to absolute temperature
- D. V is directly related to square root of absolute temperature
Explanation: Vt/Vo = √ T/To This formula above shows that the speed of sound is directly related to the under root of the absolute temperature.
Correct answer: V is directly related to square root of absolute temperature- A. 1/Hertz
- B. 1/ second2
- C. Second
- D. Hertz
Explanation: Frequency is the number of occurrences of a repeating event per unit of time.
Correct answer: Hertz- A. Disturbance
- B. Heating
- C. Freezing
- D. Clapping
Explanation: A wave is produced by the disturbance of atoms, which spreads out from a source.
Correct answer: Disturbance- A. 0 deg
- B. 45 deg
- C. 90 deg
- D. 180 deg
Explanation: Option D is correct since the phase difference value ranges from 0 to 2π radians.
Correct answer: 180 deg- A. Equal to one wavelength
- B. Equal to two wavelength
- C. Equal to half of wavelength
- D. Equal to quarter of wavelength
Explanation: Option C is correct since A standing wave pattern always consists of an alternating pattern of nodes and antinodes.
Correct answer: Equal to half of wavelength806. In stationary waves:
- A. Strain is maximum at antinodes
- B. Strain is minimum at nodes
- C. Strain is maximum at node
- D. Amplitude is same at all points
Explanation: In a stationary wave, the node is the point of minimum amplitude. Minimum amplitude means maximum strain, therefore strain is maximum at…
Correct answer: Strain is maximum at node- A. A
- B. 2A
- C. 4A
- D. 6A
Explanation: The particles in a transverse wave oscillate periodically in a direction perpendicular to the propagation of the wave.
Correct answer: 6A- A. An incident crest on reflection disappears
- B. An incident trough on reflection remains a trough
- C. An incident crest on reflection becomes a trough
- D. An incident crest on reflection remains a crest
Explanation: When a transverse wave travels from a rarer medium to a denser medium, it reflects at the boundary.
Correct answer: An incident crest on reflection becomes a trough- A. fn = (n*v)/(4*l) where n = 1,3,5,...
- B. fn = (n+v)/(4+l) where n = 1,3,5,...
- C. fn = (n*v)/(4+l) where n = 1,2,3,4,5,...
- D. fn = (n*v)/(4*l) where n = 1,2,3,4,5,...
Explanation: Correct Option: A When a stationary wave is set up in a pipe closed at one end, only odd harmonics are generated.
Correct answer: fn = (n*v)/(4*l) where n = 1,3,5,...- A. 0.33s
- B. 3s
- C. 1.5s
- D. 6s
Explanation: Correct Option: BAs from the formula we know that Speed-wavelength /Time period....Rearranging the equationTime period…
Correct answer: 3s811. The frequency of a wave is 60 Hz. How long does it take to pass 20 complete waves from a point?
- A. 1200 sec
- B. 12 sec
- C. 3 sec
- D. 1/3 sec
Explanation: Frequency = 60 Hz this means that the number of waves passing in 1 second is 60 So now the period becomes 1/60 As we know that T=1/60 so…
Correct answer: 1/3 sec- A. 1.2m
- B. 0.84m
- C. 0.60m
- D. 0.42m
Explanation: Option A is correct since by Applying the formula: F = v / 2L 2L = v / F , 2L = 480 / 400 = 1.2 / 2 = 0.60 m Options B, C, and D are…
Correct answer: 0.60m- A. Tangent
- B. Radius
- C. Wavelength
- D. Ray of light
Explanation: A line that is drawn normally/perpendicular to the wavefronts in the direction of the light waves is referred to as a light ray.
Correct answer: Ray of light- A. Time period
- B. Wavelength
- C. Wave speed
- D. Frequency
Explanation: The distance between two successive crests or troughs is called a wavelength.Reference: pg#165
Correct answer: Wavelength- A. 30 cm
- B. 45 cm
- C. 5 cm
- D. 10 cm
Explanation: Phase difference = 21π/λ xdistance between the two pointsTherefore:3π = 27π/λ × 153 = 30/λλ = 30/3 = 10 cmAs it is numerical so it can…
Correct answer: 10 cm- A. Diffraction
- B. Interference
- C. Dispersion
- D. Polarization
Explanation: A thin oil film on a water surface appears colored because of thin-film interference which involves the interference of light waves…
Correct answer: Interference- A. 2L
- B. 1/2 L
- C. L
- D. 3L
Explanation: Maximum wavelength is formed in 1st Harmonic, in which L = λ / 2. Therefore, λ = 2L. Hence, Option A is correct.
Correct answer: 2L- A. 500 Hz
- B. 400 Hz
- C. 430 Hz
- D. 300 Hz
Explanation: Doppler frequency or apparent frequency when the source moves towards a stationary observer is:
Correct answer: 500 Hz- A. Lesser than 2kHz
- B. Greater than 2kHz
- C. Lesser than 20kHz
- D. Greater than 20kHz
Explanation: A sound wave is a vibration that is transmitted through a medium, such as air, water, and metals.
Correct answer: Greater than 20kHz- A. Increases
- B. Decreases
- C. Remains same
- D. Increases then decreases
Explanation: The velocity of sound is related to temperature as:v2 ∝ Tor v ∝ √THence, increasing temperature increases the velocity of sound.
Correct answer: Increases