# 9702 P4 Production and use of X-rays Topic Questions

> CIE IAL 9702 P4: every Production and use of X-rays topic question from 4 papers (2025–2026), grouped by syllabus point. 18 questions, 37 marks, with direct…

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CIE IAL · Physics · 9702 P4 · A Level

Every 9702 P4 Production and use of X-rays topic question from the 2025–2027 syllabus, drawn from 4 papers (2025–2026) and grouped by syllabus point. Each row opens a page listing the exact question numbers, marks and a direct link into the paper. These are questions by topic, not full papers, so you can revise one topic at a time.

- 9702 P4
- 4 subtopics
- 18 topic questions
- 4 papers
- 37 tagged marks
- [Back to Production and use of X-rays](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/)
- [All paper codes](https://www.examsci.com/topics/)

Core finding

**1 explain that X-rays are produced by electron bombardment of a metal… is the most frequently assessed subtopic in Production and use of X-rays, with 10 topic questions and 22 marks across 3 papers.** 2 understand the use of X-rays in imaging internal body… follows with 5 topic questions and 8 marks. The topic contains 4 subtopics, 18 topic questions and 37 marks in total. Rows count only the parts tagged to that subtopic, keep the same colour in both charts and repeat paper count, tagged marks and year range in the native table.

## Topic question count and mark distribution

Subtopics are on the vertical axis and sorted from highest to lowest. Only the parts whose knowledge graph matches a subtopic are counted for it, and percentages are each row's share of the tagged total in that chart. A part tagged to several subtopics is counted in each bar, so the bars are not a partition of the topic total.

### Questions by subtopic

question items

- [1 explain that X-rays are produced by electron bombardment of a metal target and calculate the minimum wavelength of X-rays produced from the accelerating p.d.](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/1-explain-that-x-rays-are-produced-by-electron-bombardment-of-a-metal-target-and/) (3 papers) — 10 · 55.6%
- [2 understand the use of X-rays in imaging internal body structures, including an understanding of the term contrast in X-ray imaging](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/2-understand-the-use-of-x-rays-in-imaging-internal-body-structures-including-an/) (4 papers) — 5 · 27.8%
- [3 recall and use $I = I_0 e^{-\mu x}$ for the attenuation of X-rays in matter](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/3-recall-and-use-i-i-0-e-mu-x-for-the-attenuation-of-x-rays-in-matter/) (1 papers) — 2 · 11.1%
- [4 understand that computed tomography (CT) scanning produces a 3D image of an internal structure by first combining multiple X-ray images taken in the same section from different angles to obtain a 2D image of the section, then repeating this process along an axis and combining 2D images of multiple sections](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/4-understand-that-computed-tomography-ct-scanning-produces-a-3d-image-of-an-internal/) (1 papers) — 1 · 5.6%

### Marks by subtopic

marks

- [1 explain that X-rays are produced by electron bombardment of a metal target and calculate the minimum wavelength of X-rays produced from the accelerating p.d.](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/1-explain-that-x-rays-are-produced-by-electron-bombardment-of-a-metal-target-and/) (3 papers) — 22 · 59.5%
- [2 understand the use of X-rays in imaging internal body structures, including an understanding of the term contrast in X-ray imaging](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/2-understand-the-use-of-x-rays-in-imaging-internal-body-structures-including-an/) (4 papers) — 8 · 21.6%
- [3 recall and use $I = I_0 e^{-\mu x}$ for the attenuation of X-rays in matter](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/3-recall-and-use-i-i-0-e-mu-x-for-the-attenuation-of-x-rays-in-matter/) (1 papers) — 4 · 10.8%
- [4 understand that computed tomography (CT) scanning produces a 3D image of an internal structure by first combining multiple X-ray images taken in the same section from different angles to obtain a 2D image of the section, then repeating this process along an axis and combining 2D images of multiple sections](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/4-understand-that-computed-tomography-ct-scanning-produces-a-3d-image-of-an-internal/) (1 papers) — 3 · 8.1%

## Subtopic comparison matrix

Curriculum order is by syllabus number, then alphabetically. Every row links to the matching past-paper question list.

| Subtopic | Topic questions | Papers | Marks | Years | |
| --- | --- | --- | --- | --- | --- |
| **[1 explain that X-rays are produced by electron bombardment of a metal target and calculate the minimum wavelength of X-rays produced from the accelerating p.d.](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/1-explain-that-x-rays-are-produced-by-electron-bombardment-of-a-metal-target-and/)** | 10 | 3 | 22 | 2025–2026 | [Open topic questions](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/1-explain-that-x-rays-are-produced-by-electron-bombardment-of-a-metal-target-and/) |
| **[2 understand the use of X-rays in imaging internal body structures, including an understanding of the term contrast in X-ray imaging](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/2-understand-the-use-of-x-rays-in-imaging-internal-body-structures-including-an/)** | 5 | 4 | 8 | 2025–2026 | [Open topic questions](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/2-understand-the-use-of-x-rays-in-imaging-internal-body-structures-including-an/) |
| **[3 recall and use $I = I_0 e^{-\mu x}$ for the attenuation of X-rays in matter](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/3-recall-and-use-i-i-0-e-mu-x-for-the-attenuation-of-x-rays-in-matter/)** | 2 | 1 | 4 | 2025 | [Open topic questions](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/3-recall-and-use-i-i-0-e-mu-x-for-the-attenuation-of-x-rays-in-matter/) |
| **[4 understand that computed tomography (CT) scanning produces a 3D image of an internal structure by first combining multiple X-ray images taken in the same section from different angles to obtain a 2D image of the section, then repeating this process along an axis and combining 2D images of multiple sections](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/4-understand-that-computed-tomography-ct-scanning-produces-a-3d-image-of-an-internal/)** | 1 | 1 | 3 | 2025 | [Open topic questions](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/4-understand-that-computed-tomography-ct-scanning-produces-a-3d-image-of-an-internal/) |

## Browse every topic question

- [1 explain that X-rays are produced by electron bombardment of a metal target and calculate the minimum wavelength of X-rays produced from the accelerating p.d.](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/1-explain-that-x-rays-are-produced-by-electron-bombardment-of-a-metal-target-and/) — 10 question items · 3 papers — 22 marks · 2025–2026
- [2 understand the use of X-rays in imaging internal body structures, including an understanding of the term contrast in X-ray imaging](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/2-understand-the-use-of-x-rays-in-imaging-internal-body-structures-including-an/) — 5 question items · 4 papers — 8 marks · 2025–2026
- [3 recall and use $I = I_0 e^{-\mu x}$ for the attenuation of X-rays in matter](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/3-recall-and-use-i-i-0-e-mu-x-for-the-attenuation-of-x-rays-in-matter/) — 2 question items · 1 papers — 4 marks · 2025
- [4 understand that computed tomography (CT) scanning produces a 3D image of an internal structure by first combining multiple X-ray images taken in the same section from different angles to obtain a 2D image of the section, then repeating this process along an axis and combining 2D images of multiple sections](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/production-and-use-of-x-rays/4-understand-that-computed-tomography-ct-scanning-produces-a-3d-image-of-an-internal/) — 1 question items · 1 papers — 3 marks · 2025

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- [Electric potential 26 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-4/electric-potential/)

## Topic question rules and edge cases

**How many subtopics does Production and use of X-rays contain?**

This page lists 4 subtopics tagged to the current syllabus. They are ordered by syllabus number, then alphabetically, and each row opens a page of matching past-paper questions.

**How are the subtopic question and mark totals calculated?**

A multiple-choice question contributes one item and its marks to every subtopic it is tagged with. A structured question contributes one item per tagged part, and that part’s marks; untagged parts of the same question are not counted here. A part tagged to several subtopics therefore appears under each of them.

**Why do some subtopics have no numbered prefix?**

Practical-skills statements and some syllabus bullets are unnumbered. Numbered statements come first; unnumbered statements and ties are sorted alphabetically.

**Is the LaTeX rendered without JavaScript?**

Yes. Subtopics that contain formulas are converted to static KaTeX HTML during the build, and the KaTeX stylesheet is served from the same site.

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