Physics
Grade-8
Easy
Question
A louder sound is audible even if the source of sound is far away. This is because ____.
- Louder sounds are of greater frequency
- Louder sounds transfer a high amount of energy
- Louder sounds are of smaller frequency
- Louder sounds transfer a low amount of energy
Hint:
- A sound is a form of energy.
- Loudness depends on amplitude.
The correct answer is: Louder sounds transfer a high amount of energy
- The loudness of a sound depends on the amplitude of the wave.
- The pitch depends on frequency.
- Greater amplitude waves have more energy and greater intensity
- Therefore they sound louder.
- So, the correct option is b.
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