DP Physics (first assessment 2025)

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Question 22M.1A.SL.TZ1.13

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Date May 2022 Marks available [Maximum mark: 1] Reference code 22M.1A.SL.TZ1.13
Level SL Paper 1A Time zone TZ1
Command term Question number 13 Adapted from N/A
13.
[Maximum mark: 1]
22M.1A.SL.TZ1.13

A wave of period 10 ms travels through a medium. The graph shows the variation of particle displacement with distance for the wave.

What is the average speed of a particle in the medium during one cycle?

A.  4.0 m s−1

B.  8.0 m s−1

C.  16 m s−1

D.  20 m s−1

[1]

Markscheme

C

Examiners report

Option D was a very efficient distractor as the most common (incorrect) selection by both HL and SL candidates. The difficulty index was low for this question, suggesting that HL and SL candidates found this question quite challenging. Candidates are again encouraged to read the questions carefully; it is likely that candidates selecting option D were providing the wave speed rather than particle speed.

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