Question 4

4(a)(i)1 mark

By reference to the direction of transfer of energy, state what is meant by a transverse wave.

Your answer

Suggested time: 2 min

4(a)(ii)2 marks

State the principle of superposition.

State A short answer. No explanation is needed, and adding one cannot earn extra marks.

Your answer

Suggested time: 3 min

4(b)(i)2 marks

Circular water waves are produced by vibrating dippers at points P and Q, as illustrated in Fig. 4.1.

The waves from P alone have the same amplitude at point R as the waves from Q alone. Distance PR is 44 cm and distance QR is 29 cm.

The dippers vibrate in phase with a period of 1.5 s to produce waves of speed 4.0 cm s⁻¹.

Calculate the wavelength of the waves.

Fig. 4.1 — see the question text for what it shows

Calculate Show your working. The method can earn marks even when the final value is wrong, and a bare answer often cannot.

Your answer

Suggested time: 3 min

4(b)(ii)1 mark

Circular water waves are produced by vibrating dippers at points P and Q vibrating in phase with a period of 1.5 s producing waves of speed 4.0 cm s⁻¹. Distance PR is 44 cm and distance QR is 29 cm.

Calculate the path difference at point R of the waves from P and Q. Give your answer in terms of the wavelength λ of the waves.

Calculate Show your working. The method can earn marks even when the final value is wrong, and a bare answer often cannot.

Your answer

Suggested time: 2 min

9702/02/SP/22Cambridge International AS & A Level Physics 9702 · Specimen 2022 · Paper 2 · sit the whole paper