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Question 19M.3.HL.TZ1.a

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Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.3.HL.TZ1.a
Level HL Paper 3 Time zone TZ1
Command term Outline Question number a Adapted from N/A
a.
[Maximum mark: 2]
19M.3.HL.TZ1.a

Outline how ultrasound, in a medical context, is produced.

[2]

Markscheme

mention of AC voltage OR to piezo-electric crystal ✔

crystal vibrates «at its resonant frequency» ✔

Examiners report

Production of ultrasound. This is not well known by many candidates. Quite a high number wrote generally correct information or statements about ultrasound, but these were not related or well considered responses directed to the question, for example, “use of gel in ultrasound medical applications”.

Syllabus sections