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QLDPhysicsQuick questions
Unit 2: Linear motion and waves
Quick questions on Standing waves and resonance (QCE Physics Unit 2)
6short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is iA1?Show answer
Often a stimulus showing the standing-wave pattern on a string or in a pipe and asking for either the harmonic number or the length given a frequency and speed.
What is eA Paper 1?Show answer
Multiple choice on which harmonics are present in closed pipes versus open pipes.
What is eA Paper 2?Show answer
A two-part question on a musical-instrument system, typically asking for wave speed and then a higher harmonic.
What is q1?Show answer
State the relationship between length and wavelength for the fundamental of a string fixed at both ends. [2 marks]
What is q2?Show answer
A pipe closed at one end has length . Using , calculate the first three resonant frequencies. [3 marks]
What is q3?Show answer
A guitar string of length has wave speed . (a) Calculate and . (b) Explain why pressing the string at the th fret (midpoint) doubles the fundamental frequency.
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