IB Physics SL C.2.4 Transverse and Longitudinal Waves

Practise classifying waves from particle displacement relative to propagation, identifying crests or compressions and explaining polarization as evidence of transverse behaviour.

Exam points

classify a wave as transverse when oscillations are perpendicular to propagation and longitudinal when parallel
identify crests and troughs or compressions and rarefactions without confusing them with particle travel
use successful polarization to show that a wave is transverse rather than longitudinal

[Maximum number: 3]

This question is in two parts. Part 1 is about a thermistor circuit. Part 2 is about vibrations and waves.
Part 1 Thermistor circuit
The circuit shows a negative temperature coefficient (NTC) thermistor X and a $100 \mathrm{k} \Omega$ fixed resistor R connected across a battery.

Figure for Question C.2.4—Transverse and longitudinal waves question 1 — IB Physics SL

The battery has an electromotive force (emf) of 12.0 V and negligible internal resistance.

The sound waves from the loudspeaker travel in air with speed $330 \mathrm{~m} \mathrm{~s}^{-1}$ .

Describe the characteristics of sound waves in air.

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C.2.4—Transverse and longitudinal waves question 1