An accurate and reliable audio oscillator is used to standardize a tuning fork. When the oscillator reading is 514, two beats are heard per second. When the oscillator reading is 510, the beat frequency is 6 Hz. The frequency of the tuning fork is:
Correct answer: C. 516
- A. 506
- B. 510
- C. 516
- D. 158
Explanation
Beats = |ffork − fosc|. From readings: |f−514| = 2 and |f−510| = 6. Solving gives f = 516 Hz (516−514=2 and 516−510=6). So 516 Hz fits both conditions.
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Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.
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