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Physics

Assertion (A) : The speed of sound is maximum in gases when compared with speed in solids.

Reason (R) : The speed of sound in a medium depends on the density of medium.

  1. both A and R are true and R is the correct explanation of A
  2. both A and R are true and R is not the correct explanation of A
  3. assertion is false but reason is true
  4. assertion is true but reason is false

Sound

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Answer

assertion is false but reason is true

Explanation

Assertion (A) is false because the speed of sound is different in different media. The speed of sound is more in solids, less in liquids and least in gases since solids are much more elastic than liquids and gases.

Reason (R) is true because the speed of sound in a medium depends on the following two factors :

(i) the elasticity E of the medium, and

(ii) the density p of the medium.

The speed of sound in a medium is given by the relation :

V=Eρ\text V = \sqrt{\dfrac{\text E}{\text ρ}}

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