A sound wave has wavelength 0.66 m in air where speed of sound is 330 m/s. Its frequency is
A100 Hz only
B200 Hz only
C500 Hz
D5000 Hz only
Answer & Solution
Correct answer: C. 500 Hz
1. Use f = V / wavelength.
2. f = 330 / 0.66.
3. = 500 Hz.
4. So the frequency is 500 Hz.
_Source: Selina Concise Physics Class 9, Ch 8 Sound (Mistral OCR'd PDF), section on numerical examples_
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