| The given table lists some characteristics of four sounds I, II, III, and IV. | ||
| Sound | Amplitude (cm) | Frequency (Hz) |
| I | 1 | 1 |
| II | 3 | 4 |
| III | 2 | 3 |
| IV | 2 | 4 |
A) I and II
B) I and III
C) II and IV
D) III and IV
Correct Answer: D
Solution :
Loudness of a sound is given by its amplitude, i.e., by the maximum height of the peak of the sound wave. As amplitude increases, loudness also increases and vice-versa. It is clear from the given table that sounds III and IV have the same amplitude. Hence, their loudness is also the same. The correct answer is D.
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