Question

Name the device which is used to produce sound in laboratory experiments.
(A)Tuning fork
(B)Simple pendulum
(C)Oscillator
(D)All

Answer 1

Hint:There are three options given in the problem where to find the device which is used in producing sound for the experiments in the laboratory. The purposes of use of all these devices have to be known. One of them is used to produce sound with a constant frequency, other works under simple harmonic motion, and the rest is a circuit that converts dc (direct current) to the ac (alternating current). The device which is related to producing the sound is the answer.

Complete step-by-step solution:
A tuning fork is an acoustic resonating device in the form of a two-pronged fork with prongs that looks like a U-shaped bar of elastic metallic substance. It is used to produce sound with a constant frequency. That's why the tuning fork is used in producing sound in laboratory experiments.
In a simple pendulum, a point mass is suspended from a string or rod of negligible mass. It is a resonant system having a single resonant frequency. It works under S.H.M (simple harmonic motion).
An oscillator is a circuit that is used to convert the dc (direct current) into ac(alternating current).
So, the simple pendulum and the oscillator are not related to producing sound in the laboratories.
Hence the right answer is Tuning fork (Option A).

Note:The sound is created in a type of wave of pressure. During the vibration of an object, the air molecules of the atmosphere vibrate. By initiating a chain reaction the wave of sound vibrates throughout the medium.
In most ways, sound waves have similar properties to light waves. They both come from a source and can be scattered. but sound waves can only traverse through a medium, such as air, glass, or metal i.e.there’s no sound in space.