The sounds of the frequency greater than 20000 Hz are called:
Correct answer: B. Ultrasonic
- A. Audible sound
- B. Ultrasonic
- C. Infrasonic
- D. All of these
Explanation
Frequencies above ≈20 kHz are ultrasonic (above human hearing range). Infrasonic is below audible range.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Waves
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.
Practise Waves
1,281 free Waves MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Waves questions
An organ pipe with both ends open is 0.85 m long. Assuming that the speed of sound is 340 m/s, the frequency of the third harmonic of this pipe is:
In transverse waves the particles of the medium vibrate:
Which of the following correctly describes a wave?
If 30 waves per second pass through a medium at a speed of 30 ms⁻¹ then the wavelength is:
When a transverse wave is reflected on going from a denser to a rarer medium, then:
If the speed of a transverse wave on a stretched string of length 1 m is 60 m/s, what is the fundamental frequency of vibration?