DP Physics (last assessment 2024)

Test builder »

Question 21M.2.SL.TZ1.a

Select a Test
Date May 2021 Marks available [Maximum mark: 2] Reference code 21M.2.SL.TZ1.a
Level SL Paper 2 Time zone TZ1
Command term Outline Question number a Adapted from N/A
a.
[Maximum mark: 2]
21M.2.SL.TZ1.a

On a guitar, the strings played vibrate between two fixed points. The frequency of vibration is modified by changing the string length using a finger. The different strings have different wave speeds. When a string is plucked, a standing wave forms between the bridge and the finger.

                                                       

Outline how a standing wave is produced on the string.

[2]

Markscheme

«travelling» wave moves along the length of the string and reflects «at fixed end» ✓

superposition/interference of incident and reflected waves ✓

the superposition of the reflections is reinforced only for certain wavelengths ✓ 

Syllabus sections