Free Wave Speed MCQs with Answers
34 Wave Speed MCQs from Physics, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Wave speed is the rate at which a disturbance or wave pattern travels through a medium, given by v = fλ, where f is frequency and λ is wavelength. Questions examine how speed changes between media, the relation among frequency, wavelength and period, and why wave speed is not the same as particle vibration speed.
Last updated
34 questions · page 1 of 2
- A. v equals f divided by wavelength
- B. v equals f times wavelength
- C. v equals wavelength divided by f
- D. v equals f plus wavelength
Explanation: In one period the wave advances exactly one wavelength, so dividing wavelength by period gives the speed, and since frequency is the…
Correct answer: v equals f times wavelength- A. 0.68 m
- B. 1.47 m
- C. 170 m
- D. 0.34 m
Explanation: Wavelength is speed divided by frequency, so 340 divided by 500 gives 0.68 m.
Correct answer: 0.68 m- A. lower than the true pitch
- B. higher than the true pitch, because the waves reach the observer more frequently
- C. unchanged
- D. louder but of the same pitch
Explanation: Motion towards the observer crowds the wavefronts together, shortening the observed wavelength and raising the frequency, and the pitch…
Correct answer: higher than the true pitch, because the waves reach the observer more frequently- A. velocity
- B. wavelength
- C. amplitude
- D. frequency
Explanation: When light enters a different medium, its speed and wavelength change, but its frequency is fixed by the source and remains unchanged at…
Correct answer: frequency- A. sound wave only
- B. light wave only
- C. both sound and light waves
- D. neither sound nor light wave
Explanation: The Doppler effect is the apparent change in frequency caused by relative motion between source and observer, and it applies to both…
Correct answer: both sound and light waves- A. 1 m.
- B. 2 m.
- C. 10 m.
- D. 20 m.
Explanation: To find the wavelength, start by calculating the frequency: 20 sound waves pass in 2 seconds, so the frequency is 20 waves / 2 s = 10 Hz.
Correct answer: 2 m.- A. 1m
- B. 2m
- C. 10m
- D. 20m
Explanation: To find the wavelength (λ), use the formula λ = v/f, where v is the velocity of the wave and f is the frequency.
Correct answer: 2m- A. I only
- B. II only
- C. I and III
- D. II and III
Explanation: The speed of a wave on a string is given by the equation v = √(T/μ), where v is the speed, T is the tension in the string, and μ is the…
Correct answer: II only- A. 12.5 m/s.
- B. 25 m/s.
- C. 50 m/s.
- D. 100 m/s.
Explanation: * Understand the relationship between antinodes and wavelength: The distance between two consecutive antinodes in a wave is equal to half…
Correct answer: 50 m/s.- A. 30 m
- B. 40 m
- C. 50 m
- D. 15 m
Explanation: The distance between two successive crests or troughs is the wavelength (λ).
Correct answer: 30 m- A. 20/3 m
- B. 20x3 m
- C. 3/20 m
- D. 2/3 m
Explanation: The following is the solution:We know that speed of a travelling wave = frequency x wavelengthfrom here:wavelength = speed /…
Correct answer: 3/20 m- A. 1.22V1
- B. 0.61v
- C. 1.50v
- D. 0.75v
Explanation: Speed of sound V= square root (T/M)Where m is the mass per unit lengthFrom here we can see that V is proportional to square root (T)Also…
Correct answer: 1.22V1- A. Velocity
- B. Frequency
- C. Wavelength
- D. Phase
Explanation: The frequency of a wave remains constant as it moves from one medium to another.
Correct answer: Frequency- A. 2.7 ms-1
- B. 3 ms-1
- C. 200 ms-1
- D. 2 ms-1
Explanation: Number of waves passing through a certain point in 1 second = 40 waves The wavelength of the wave (λ)= cm Find:Wave speed.
Correct answer: 2 ms-1- A. 2.7 m/s
- B. 3 m/s
- C. 200 m/s
- D. 2 m/s
Explanation: The formula for the speed of a wave is v=fλ Since 40 waves pass through a certain point in one second, the frequency of the wave is 40 Hz.
Correct answer: 2 m/s- A. 1 ms-1
- B. 2 ms-1
- C. 3 ms-1
- D. 4 ms-1
Explanation: Frequency=100, Wavelength= 1cm = 1/100 = 0.01m. Frequency = Speed/Wavelength (Frequency) (Wavelength) =Speed (100)(0.01)=1m/s.
Correct answer: 1 ms-1- A. Frequency
- B. Wavelength
- C. Amplitude
- D. Time period
Explanation: The wavelength (λ) is the total distance travelled by the wave in one full cycle.
Correct answer: Wavelength- A. 33 Hz
- B. 330 Hz
- C. 3300 Hz
- D. 33000 Hz
Explanation: Speed of sound in air = 330m/s Wavelength = 10 cm = 0.1 m Frequency = speed of sound / wavelength Frequency = 330/0.1 = 3300 Hz Thus…
Correct answer: 3300 Hz- A. Speed = frequency * wavelength
- B. Speed * frequency= wavelength
- C. Speed =frequency/ wavelength
- D. Speed =frequency+ wavelength
Explanation: Wave speed is related to wavelength and wave frequency by the equation: Speed = Wavelength x Frequency.
Correct answer: Speed = frequency * wavelength- A. 300 m/s
- B. 150 m/s
- C. 300 cm/s
- D. 150 cm/s
Explanation: For wavelength, According to the formula of Phase Difference = 2 / where, = phase difference ( phase angle between two points ) =…
Correct answer: 150 m/sWave Speed MCQs: common questions
Are these Wave Speed MCQs free?
Yes. All Wave Speed MCQs from Physics are free on TestUstad, with unlimited attempts and no account needed. Nothing on this page is a sample or a trial.
How many Wave Speed MCQs are on this page?
There are 34 Wave Speed MCQs in the Physics bank, shown 20 to a page with the correct answer and an explanation on each.
Does every Wave Speed MCQ have an explanation?
Yes. Each Wave Speed question shows the correct option and a written explanation of why it is correct, so a wrong answer teaches you something rather than just being marked wrong.
Can I take a timed Wave Speed test?
Yes. The practice button on this page starts a free Wave Speed test drawn from the Physics bank. It marks each answer instantly, gives you a score at the end, and can be retaken as many times as you like.