Question

The following figure shows a sound wave with some characteristics labelled with letters.
An increase in which of its characteristics would make the sound louder?

• A. W
• B. X
• C. Y
• D. Z

Answer 1

The correct option is A W

Loudness of the sound depends on the amplitude of the sound wave. The higher the amplitude, the louder the sound will be.
In the given displacement-time graph of a wave, letter W represents the amplitude of sound as it shows the maximum displacement of the particle of the medium from its mean position.
Hence, an increase in W will lead to an increase in the loudness of sound.