DP Physics (last assessment 2024)
Question 22N.2.HL.TZ0.b.ii
| Date | November 2022 | Marks available | [Maximum mark: 2] | Reference code | 22N.2.HL.TZ0.b.ii |
| Level | HL | Paper | 2 | Time zone | TZ0 |
| Command term | Describe | Question number | b.ii | Adapted from | N/A |
b.ii.
[Maximum mark: 2]
22N.2.HL.TZ0.b.ii
A string of length 0.80 m is fixed at both ends. The diagram shows a standing wave formed on the string. P and Q are two particles on the string.
It is suggested that the speed c of waves in the string is related to the tension force T in the string according to the equation T = ac2, where a is a constant.
The tension force on the string is doubled. Describe the effect, if any, of this change on the frequency of the standing wave.
[2]
Markscheme
speed increases hence frequency increases ✓
by factor ✓
Examiners report
This question was answered well, although the numerical aspect was often missing. It is worth highlighting that if there is a term like 'doubled' in the question, it makes sense to expect a numerical answer.
