A student in St. Lucia investigates how changing the tension of a string affects the sound produced. She finds that increasing the tension produces a higher pitched note. Which statement best explains this observation?

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Question

A student in St. Lucia investigates how changing the tension of a string affects the sound produced. She finds that increasing the tension produces a higher pitched note. Which statement best explains this observation?

Accepted Answer

Increased tension causes the string to vibrate at a higher frequency — Award 1 mark for explaining that increased tension increases the frequency of vibration, which produces a higher pitch. A is incorrect because increased tension causes faster vibration, not slower. B is incorrect because amplitude affects loudness, not pitch. D is incorrect because the tension of the string does not affect the speed of sound in air.

Answer

Increased tension causes the string to vibrate more slowly

Answer

Increased tension causes the sound to travel faster through the air

Answer

Increased tension causes the string to vibrate with greater amplitude

Answer

Increased tension causes the string to vibrate at a higher frequency

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