Physics
Grade-8
Easy
Question
The frequency of vibration of an object is 150 Hz. A person ____ hear it.
- Cannot
- Can
- Sometimes can
- None of the above
Hint:
Audible range = 20Hz to 20kHz
The correct answer is: Can
- Sounds which have frequencies between 20Hz to 20KHz are perceivable by the human ear.
- Therefore, frequency of 150Hz comes in the audible range and can be heard.
- So, the correct option is b.
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