DP Physics (last assessment 2024)
Question 19M.3.HL.TZ2.aiii
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.HL.TZ2.aiii |
| Level | HL | Paper | 3 | Time zone | TZ2 |
| Command term | Calculate | Question number | aiii | Adapted from | N/A |
aiii.
[Maximum mark: 1]
19M.3.HL.TZ2.aiii
An ultrasound A-scan is performed on a patient.
Ultrasound of intensity 50 mW m-2 is incident on a muscle. The reflected intensity is 10 mW m-2. Calculate the relative intensity level between the reflected and transmitted signals.
[1]
Markscheme
Examiners report
The question was generally well answered with a few candidates simply taking the ratio of intensities instead of 10x log ratio (Intensity level)
