DP Physics (last assessment 2024)
Question 18M.3.HL.TZ2.11
| Date | May 2018 | Marks available | [Maximum mark: 5] | Reference code | 18M.3.HL.TZ2.11 |
| Level | HL | Paper | 3 | Time zone | TZ2 |
| Command term | Describe, Draw | Question number | 11 | Adapted from | N/A |
11.
[Maximum mark: 5]
18M.3.HL.TZ2.11
The natural frequency of a driven oscillating system is 6 kHz. The frequency of the driver for the system is varied from zero to 20 kHz.
(a)
Draw a graph to show the variation of amplitude of oscillation of the system with frequency.
[3]
Markscheme
general shape as shown
peak at 6 kHz
graph does not touch the f axis
[3 marks]
(b)
The Q factor for the system is reduced significantly. Describe how the graph you drew in (a) changes.
[2]
Markscheme
peak broadens
reduced maximum amplitude / graph shifted down
resonant frequency decreases / graph shifted to the left
[2 marks]
