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 43 of 65
- A. Pitch
- B. Intensity
- C. Beats
- D. Quality
Explanation: Pitch is the characteristic of sound by which we can distinguish between a shrill and a grave sound.
Correct answer: Pitch- A. 0.5 m
- B. 1.0 m
- C. 1.5 m
- D. 2.0 m
Explanation: Since the wave is moving to the right, we can draw the position of the wave at the next instant by simply replicating the wave, but…
Correct answer: 0.5 m- A. Directly
- B. Inversely
- C. Exponentially
- D. No effect
Explanation: The quality of a sound governed by the rate of vibrations producing it is called pitch.
Correct answer: Directly- A. λ/8
- B. λ/6
- C. λ/4
- D. λ/2
Explanation: The distance between two consecutive antinodes (or two consecutive nodes) is equal to half a wavelength as shown:
Correct answer: λ/2- A. λ/4
- B. λ
- C. λ/2
- D. 2λ
Explanation: Option C is correct.The distance between two consecutive nodes or antinodes is half of the wavelength.
Correct answer: λ/2- A. Hologram technology
- B. To obtain the frequency of the matter waves
- C. Determining speed of light in mediums
- D. Sending radar signals
Explanation: The applications of doppler effects are tracking satellite, measuring speed of automobile by traffic police, sending radar signals, VOR…
Correct answer: Sending radar signals- A. Polarization
- B. Particle nature
- C. Property of energy transmission in space
- D. Phenomena of superposition of waves
Explanation: In air column and wind instruments, longitudinal waves produce superposition. Hence, option D is correct.
Correct answer: Phenomena of superposition of waves- A. Displacement of the wave
- B. Amplitude of the wave
- C. Speed of the wave
- D. Time period of the wave
Explanation: As v= fλ So the product of frequency and wavelength is equal to speed of wave.
Correct answer: Speed of the wave- A. 300 m/s
- B. 332 m/s
- C. 362 m/s
- D. 382 m/s
Explanation: As vt = vo + 0.61(t°C) vt = 332 + 0.61(50) vt = 362 m/s Hence, option C is correct.
Correct answer: 362 m/s- A. 1 m
- B. 2m
- C. 1/2 m
- D. 1/4 m
Explanation: Amplitude is maximum distance from mean position. In the given figure, the maximum position above the mean position is 1 m which is the…
Correct answer: 1 m- A. 332 ms-1
- B. 338.1 ms-1
- C. 332.61 ms-1
- D. 33.4 ms-1
Explanation: As the temperature increases by 1°C the speed of sound increases by 0.6 ms-1.
Correct answer: 338.1 ms-1- A. Density of gas
- B. Moisture in air
- C. Temperature
- D. Pressure of gas
Explanation: The factor that does not significantly affect the speed of sound in air (under normal conditions) is pressure of gas.
Correct answer: Pressure of gas- A. 2.04 x 10^13 Hz
- B. 4.36 x 10^14 Hz
- C. 4.57 x 10^14 Hz
- D. 4.79 x 10^14 Hz
Explanation: Given: v (receding speed) = 1.40 x 10^7 m/s f_source (emitted frequency) = 4.57 x 10^14 Hz c (speed of light) = 3.0 x 10^8 m/s Doppler…
Correct answer: 4.36 x 10^14 Hz- A. Ice
- B. Frequency and fog
- C. Temperature and density
- D. Density and amplitude
Explanation: The correct statement is C. Temperature and density.The speed of sound in an ideal gas depends on both temperature and density.
Correct answer: Temperature and density- A. Remain stationary
- B. Move away
- C. Move toward
- D. Move in Simple Harmonic Motion
Explanation: The correct statement is D. Move in Simple Harmonic Motion.The correct description is that particles of the medium move in simple harmonic…
Correct answer: Move in Simple Harmonic Motion- A. Frequency
- B. Amplitude
- C. Wavelength
- D. Velocity
Explanation: Option A is correct. Frequency is the number of waves that pass a point in one second.
Correct answer: Frequency- A. Wave length
- B. Wave speed
- C. Highest point of the wave
- D. Lowest point of the wave
Explanation: The correct statement is D. Lowest point of the wave. The trough is the lowest point in a wave where the displacement of the medium is at…
Correct answer: Lowest point of the wave- A. 540 m/s
- B. 9 m/s
- C. 5.4 m/s
- D. None
Explanation: Frequency (f) = 54 waves per minute.Wavelength (λ) = 10 meters.The velocity (v) of a wave is given by the formula:v = f * λSubstitute the…
Correct answer: 9 m/s- A. 100 s
- B. 2.0 s
- C. 4.0 s
- D. 0.25 s
Explanation: The time period (T) of a wave is calculated using the formula T = λ/v, where λ is the wavelength and v is the wave speed.
Correct answer: 0.25 s- A. solids, gas
- B. solids, liquids
- C. gases, solids
- D. liquid, gases
Explanation: Longitudinal waves, such as sound waves, travel slower in gases than in solids.
Correct answer: gases, solids