Physics
Grade-8
Easy
Question
The frequency of vibration of an object is 25000 Hz. A person ____ hear it.
- Cannot
- Can
- Sometimes can
- None of the above
Hint:
Audible range of frequency for humans = 20Hz-20KHz
The correct answer is: Cannot
- Audible range of frequency for an average human ear lies between 20Hz to 20KHz.
- Therefore, the frequency of 25000Hz can't be heard by a human.
- So, the correct option is a.
Frequency above 20KHz is called ultrasound.
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