The frequency of a string on a musical instrument can be changed either by:
Correct answer: C. Varying the tension or by changing the length
- A. Varying the diameter or by changing the length
- B. Varying the tension or by changing the thickness
- C. Varying the tension or by changing the length
- D. Varying the thickness or by changing the length
Explanation
Varying the tension leads to increase or decrease in frequency, while changing the length of the string also changes the frequency.
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About Waves
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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