IB Physics SL C.4.3 Strings and Pipes Question Bank

Practise IB Physics SL C.4.3 by calculating harmonics and frequencies in strings and open or closed pipes using their boundary conditions.

[Maximum number: 3]

(a)

A loudspeaker emits sound of frequency 210 Hz into a pipe with one open and one closed end. The diagram shows a representation of the standing wave established in the pipe.

[ 1 ]

(i)

Determine the wavelength of the wave.

[ 1 ]

$\lambda=\lessdot \frac{4 L}{3}=\frac{4 \times 1.20}{3}=>1.6<\mathrm{m} \gg$

[1]

(b)

The frequency of sound is reduced to 140 Hz . Explain why a standing wave will not be formed in the pipe.

[ 2 ]

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C.4.3—Strings and pipes question 1

Question (a)

Question (i)

Question (b)