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 44 of 65
- A. 𝛌
- B. 𝛌/2
- C. 2𝛌
- D. 𝛌/4
Explanation: The correct answer is 𝛌/4 because in wave motion, a node is a point of destructive interference where the amplitude is zero, and an…
Correct answer: 𝛌/4- A. 33.3 cm
- B. 66.7 cm
- C. 150 cm
- D. 75 cm
Explanation: The length of the string is 150 cm and it vibrates in four segments. Each segment corresponds to half a wavelength, so the total length of…
Correct answer: 75 cm863. If the pressure of air enclosed in a long tube is increased 10 times, then the speed of sound will:
- A. Increase
- B. Decrease
- C. Remain constant
- D. Becomes zero
Explanation: The speed of sound in a gas is primarily determined by the temperature of the gas rather than the pressure.
Correct answer: Remain constant- A. Sound waves
- B. Light waves
- C. Water waves
- D. Earthquake waves
Explanation: Light waves are electromagnetic waves that do not require a material medium to travel.
Correct answer: Light waves- A. Amplitude, wavelength and acceleration
- B. Frequency, wavelength and acceleration
- C. Wavelength, frequency and speed of wave
- D. Displacement, wavelength and speed of wave
Explanation: A wave is typically characterized by the following physical parameters:1.
Correct answer: Wavelength, frequency and speed of wave- A. In a ripple tank using spherical dippers
- B. Using electromagnetic vibrator
- C. By giving sudden up and down movement to a rope with one fixed end
- D. All of the above
Explanation: A ripple tank is a shallow glass tank filled with water where waves are generated to study their behavior.
Correct answer: In a ripple tank using spherical dippers- A. less than
- B. more that
- C. equal to
- D. none of these
Explanation: The Doppler effect states that when a source of waves (such as sound or light) moves towards a stationary observer, the apparent frequency…
Correct answer: more that- A. Speed of sound wave
- B. Velocity of sound wave
- C. Wavelength of sound wave
- D. Amplitude of sound wave
Explanation: The speed of a sound wave is the distance it travels per unit time, typically measured in meters per second (m/s).
Correct answer: Speed of sound wave- A. Wave speed
- B. Time period
- C. Wavelength of waves
- D. Frequency of waves
Explanation: The frequency of waves is the number of waves that pass through a certain point in a unit of time, typically measured in Hertz (Hz).
Correct answer: Frequency of waves- A. Longitudinal waves
- B. Transverse waves
- C. Mechanical waves
- D. Electromagnetic waves
Explanation: Longitudinal waves are waves in which the particles of the medium vibrate back and forth along the direction of propagation of the wave.
Correct answer: Longitudinal waves- A. 0.3 Hz
- B. -0.3 Hz
- C. 0 Hz
- D. 223.35 Hz
Explanation: The beat frequency is the difference between the two frequencies. To find the beat frequency, subtract the smaller frequency from the…
Correct answer: 0.3 Hz- A. With different harmonics
- B. With different frequencies
- C. Parallel to the direction of wave travel
- D. Perpendicular to the direction of wave travel
Explanation: In transverse waves, particles oscillate perpendicular to wave motion
Correct answer: Perpendicular to the direction of wave travel- A. Longitudinal waves
- B. Electromagnetic waves
- C. Sound only
- D. Both longitudinal and electromagnetic waves
Explanation: Explanation: The Doppler effect occurs whenever there is relative motion between a source of waves and an observer.
Correct answer: Both longitudinal and electromagnetic waves- A. Temperature
- B. Pressure
- C. Density
- D. Humidity
Explanation: Correct. In an ideal gas, the velocity of sound is given byv= squareroot (γRT/M) which shows that it depends on temperature but is…
Correct answer: Pressure- A. 332 ms−1
- B. 166 ms−1
- C. 88 ms−1
- D. Not defined
Explanation: Explanation: Sound waves require a medium to propagate. In a vacuum, there are no particles to carry the sound waves.
Correct answer: Not defined- A. Amplitude
- B. Frequency
- C. Wavelength
- D. Phase
- E. Direction of propagation
Explanation: These two waves differ in phase, therefore option D is the correct answer.
Correct answer: Phase- A. 160 decibel
- B. Zero decibel
- C. 140 decibel
- D. 120 decibel
- E. 60 decibel
Explanation: The faintest audible intensity corresponds to a sound level of: Zero decibel.
Correct answer: Zero decibel- A. Amplitude
- B. Velocity
- C. Pitch
- D. Quality
- E. Wavelength
Explanation: When a sound wave travels from one medium to another, the characteristic that remains unchanged is: Pitch.
Correct answer: Pitch- A. λ/4
- B. λ/2
- C. 2 λ
- D. 5λ/2
- E. 3 λ /2
Explanation: Distance between two consecutive antinodes in standing wave is λ/2, so option B is correct.Nodes and antinodes are known to generate the…
Correct answer: λ/2- A. Wavelength
- B. Frequently
- C. Zero
- D. Loudness
Explanation: Increasing the amplitude of a wave refers to increasing the magnitude or height of the wave.
Correct answer: Loudness