NDA 2022 Physics question

Which one of the following statements about the speed of sound waves is not correct?

(A)The speed of sound waves in steel is higher than that in water.
(B)The speed of sound waves in air decreases with increase in temperature.Correct
(C)The speed of sound waves in air increases with increase in temperature.
(D)The speed of sound waves in water is higher than that in air.

Answer: (B)

Solution

The speed of sound is greatest in solids, less in liquids and least in gases. In air it increases with

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Question ID VK-032287