Following are down the steps of an experiment to prove that medium is required for the propagation of sound waves. Arrange these steps in propagation of sound waves. Arrange these steps in proper sequence
(a) Consider a glass jar with an outlet connected to a vacuum pump and a closed lid
(b) Suspend an electric bell.
(c) Evacuate the jar by using a vaccum pump
(d) Switch on the electric bell
(e) Observe that the intensity of the sound is less when the jar is evacuated
(f) This proves that medium is required for the propagation of sound

Options

A. FED ABC
B. ABDECF
C. ABDCEF
D. ABCDEF

Answer

C

Explanation

Take a glass jar with closed lid and an outlet connected to a vaccum pump (a). Suspend an electric bell (b) and switch it on (d). Now evacuate the jar (c) and observe that the intensity of sound is decreased when the jar is evacuated (e). This proves that a medium is required for the propagation of sound (f).