DP Physics (first assessment 2025)
Question 21N.2.HL.TZ0.c
| Date | November 2021 | Marks available | [Maximum mark: 2] | Reference code | 21N.2.HL.TZ0.c |
| Level | HL | Paper | 2 | Time zone | TZ0 |
| Command term | Determine | Question number | c | Adapted from | N/A |
c.
[Maximum mark: 2]
21N.2.HL.TZ0.c
Sound of frequency 2400 Hz is emitted from a stationary source towards the oscillating plate in (b). The speed of sound is 340 m s−1.
Determine the maximum frequency of the sound that is received back at the source after reflection at the plate.
[2]
Markscheme
frequency at plate «Hz»
at source «Hz» ✓
Award [2] marks for a bald correct answer.
Award [1] mark when the effect is only applied once.
