Question

When you speak to your friend, which of the following parameters have a unique value in the sound produced?
(a) Frequency
(b) Wavelength
(c) Amplitude
(d) Wave velocity

Answer 1

Hint: In order to find the solution of the above question we need to know the characteristics of sound such as frequency, wavelength, amplitude and wave velocity produced in the medium which helps to find the solution for this.

Complete step by step answer:
When we speak there are different frequencies, wavelengths, and amplitudes in the sound produced. The frequency and the wavelength changes with the pitch of the sound and the amplitude vary with the loudness. But the wave velocity remains the same in the air when the temperature is constant.
Usually the frequency, wavelength and amplitude do not have certain value in produced sound. If the pitch of the sound varies with the frequency of the sound and the amplitude varies with the loudness.
Sound wave is a type of longitudinal wave. It is described in the form of compression and rarefaction. When we speak to an ant person, the wavelength of the sound, frequency and amplitudes are different. The frequency and the wavelength changes with the pitch of the sound and the amplitude vary with the loudness. The velocity of the wave will have a particular value in the sound which is produced, if the temperature remains constant.

So, the correct answer is “Option D”.

Note:
Wave velocity means it is the wave which travels with the speed and it is the distance travelled by a time periodic or motion of wave per unit time in different directions. Wave velocity usually refers to speed which only says magnitude, velocity which says both speed and direction.