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 39 of 65
- A. 30 cm
- B. 25 cm
- C. 15 cm
- D. 40 cm
Explanation: The distance traveled by a crest on the wave in 1.25T can be calculated by using the formula:Distance = Wave speed * TimeTo find the wave…
Correct answer: 25 cm- A. Transverse
- B. Both transverse and electromagnetic
- C. Electromagnetic
- D. Longitudinal
Explanation: X-ray belongs to the family of electromagnetic waves. All electromagnetic waves are transverse waves.
Correct answer: Both transverse and electromagnetic- A. Greater than 20000 Hz
- B. Less than 20 Hz
- C. 20 Hz
- D. Greater than 20 Hz
Explanation: Infrasonic waves are waves with frequencies below the human audible range i.e. 20-20000 Hz
Correct answer: Less than 20 Hz- A. Sound wave
- B. Light wave
- C. Stationary wave
- D. All of these
Explanation: Stationary waves, also known as standing waves, are formed by the combination of two waves with the same frequency and amplitude, moving…
Correct answer: Stationary wave- A. Transverse waves
- B. Radio waves
- C. Sound waves
- D. Light rays
Explanation: Sound waves are mechanical waves that need a medium for their propagation whereas light and radio waves are electromagnetic so they can…
Correct answer: Sound waves766. Sound waves are:
- A. Both
- B. Neither
- C. Transverse
- D. Longitudinal
Explanation: Sound waves are longitudinal waves that travel through a medium by adiabatic compression and decompression of medium particles.Note: the…
Correct answer: Longitudinal767. Water waves are:
- A. Longitudinal waves
- B. Transverse waves
- C. None of these
- D. Progressive waves
Explanation: Water waves are both longitudinal and transverse. They displace along the direction of propagation of the medium (water) and perpendicular…
Correct answer: Progressive waves- A. Leather industry
- B. Production of photographic supplies
- C. RADAR sensors
- D. None of these
Explanation: Doppler's effect is used in RADAR sensors to determine the velocities of objects far from the earth, this data is then used for analysis…
Correct answer: RADAR sensors- A. Different
- B. None of these
- C. Stationary waves cannot be formed
- D. Identical
Explanation: A standing wave, also known as a stationary wave, is a wave that oscillates in time but whose peak amplitude profile does not move in…
Correct answer: Identical- A. Long wires
- B. Infinite long strings
- C. Solid wires
- D. All of these
Explanation: A standing wave, also known as a stationary wave, is a wave that oscillates in time but whose peak amplitude profile does not move in…
Correct answer: Infinite long strings- A. Frequency
- B. Speed of sound
- C. Amplitude
- D. Wavelength
Explanation: Doppler Effect refers to the change in wave frequency during the relative motion between a wave source and its observer.
Correct answer: Frequency- A. Stationary waves
- B. Sounds waves
- C. Beats
- D. Light waves
Explanation: When two sound waves of different frequency approach your ear, the alternating constructive and destructive interference causes the sound…
Correct answer: Beats- A. Electromagnetic waves
- B. Longitudinal waves
- C. Transverse waves
- D. All of these
Explanation: When the particles of the medium vibrate perpendicular to the direction of propagation of the wave, the wave is called a transverse…
Correct answer: Transverse waves774. Doppler effect is:
- A. Change in sound between source and observer
- B. Change in frequency between source and observer
- C. Change in wavelength between source and observer
- D. None of these
Explanation: The change in apparent frequency by the relative movement of wave source or observer is called the Doppler effect.
Correct answer: Change in frequency between source and observer775. Pitch depends upon:
- A. Wavelength
- B. Amplitude
- C. Frequency
- D. Speed
Explanation: The pitch of a sound is basically the frequency of that sound. It describes how high or low the sound is.
Correct answer: Frequency- A. The energy associated with the pulses has disappeared
- B. The string does not move afterwards
- C. The string forms a straight line for a moment
- D. Pulses vanished and will not appear again
Explanation: When two pulses of equal amplitude but opposite in direction overlap on a string, they cancel each other out momentarily, making the…
Correct answer: The string forms a straight line for a moment- A. 10 cm
- B. 5 cm
- C. 7.5 cm
- D. 30 cm
Explanation: The wavelength (λ) of a periodic wave is the distance between two consecutive crests or two consecutive troughs of the wave.
Correct answer: 30 cm- A. V = E/d
- B. V = E*d
- C. v2 = E*d
- D. v2 = E/d
Explanation: Explanation:we can see that the speed of sound in a medium is given by the square root of the ratio of its elastic modulus to its density…
Correct answer: v2 = E/d- A. It becomes one-ninth as large
- B. It becomes one-third as large
- C. It becomes three times larger
- D. It becomes nine times large
Explanation: Intensity is inversely proportional to the square(due to the inverse square law) of distance from the source, as a larger distance means…
Correct answer: It becomes one-ninth as large- A. λ
- B. 2λ
- C. λ/2
- D. λ/4
Explanation: The distance between successive nodes or antinodes is half of the wavelength. So, option C is correct.
Correct answer: λ/2