DP Physics (last assessment 2024)

Test builder »

Question 19M.3.HL.TZ2.biv

Select a Test
Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.3.HL.TZ2.biv
Level HL Paper 3 Time zone TZ2
Command term Comment Question number biv Adapted from N/A
biv.
[Maximum mark: 1]
19M.3.HL.TZ2.biv

The graph shows a received signal incident upon a transducer to produce an A-scan. The density of the soft tissue being examined is approximately 1090 kg m-3.

A physician has a range of frequencies available for ultrasound. Comment on the use of higher frequency sound waves in an ultrasound imaging study.

[1]

Markscheme

«compared to lower frequencies, higher frequencies»

have better resolution ✔

have greater attenuation ✔

used for superficial structures/organs ✔

have greater heating effect ✔

OWTTE

Award [0] for contradictory comments or for any incorrect comment

Examiners report

Most candidates mentioned that the resolution would be better at higher frequencies.

Syllabus sections