DP Physics (first assessment 2025)

Question 22N.2.SL.TZ0.a.ii

Date	November 2022	Marks available	[Maximum mark: 2]	Reference code	22N.2.SL.TZ0.a.ii
Level	SL	Paper	2	Time zone	TZ0
Command term	Calculate	Question number	a.ii	Adapted from	N/A

a.ii.

[Maximum mark: 2]

22N.2.SL.TZ0.a.ii

Calculate the speed of waves on the string.

[2]

Markscheme

wavelength $= \frac{2}{3} \times 0.80 = 0.53$ «m» ✓

speed $= \frac{0.53}{2.8 \times 10^{- 3}} = 190$ «m s⁻¹» ✓

Allow ECF from incorrect wavelength.

Examiners report

This was well answered, particularly MP1 to determine the wavelength, although several candidates misinterpreted the unit of time and obtained a very small value for the velocity of the wave.

Syllabus sections

C. Wave behaviour

C. Wave behaviour » C.2 Wave model

Question 22N.2.SL.TZ0.a.ii

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