# 9702 P2 Errors and uncertainties Topic Questions > CIE IAL 9702 P2: every Errors and uncertainties topic question from 5 papers (2025–2026), grouped by syllabus point. 7 questions, 11 marks, with direct… - Canonical HTML: https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/errors-and-uncertainties/ - Markdown mirror: https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/errors-and-uncertainties/index.md --- CIE IAL · Physics · 9702 P2 · A Level Every 9702 P2 Errors and uncertainties topic question from the 2025–2027 syllabus, drawn from 5 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 P2 - 2 subtopics - 7 topic questions - 5 papers - 11 tagged marks - [Back to Errors and uncertainties](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/errors-and-uncertainties/) - [All paper codes](https://www.examsci.com/topics/) Core finding **3 assess the uncertainty in a derived quantity by simple addition of… is the most frequently assessed subtopic in Errors and uncertainties, with 6 topic questions and 10 marks across 4 papers.** 1 understand and explain the effects of systematic errors… follows with 1 topic questions and 1 marks. The topic contains 2 subtopics, 7 topic questions and 11 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 - [3 assess the uncertainty in a derived quantity by simple addition of absolute or percentage uncertainties](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/errors-and-uncertainties/3-assess-the-uncertainty-in-a-derived-quantity-by-simple-addition-of-absolute-or/) (4 papers) — 6 · 85.7% - [1 understand and explain the effects of systematic errors (including zero errors) and random errors in measurements](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/errors-and-uncertainties/1-understand-and-explain-the-effects-of-systematic-errors-including-zero-errors-and/) (1 papers) — 1 · 14.3% ### Marks by subtopic marks - [3 assess the uncertainty in a derived quantity by simple addition of absolute or percentage uncertainties](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/errors-and-uncertainties/3-assess-the-uncertainty-in-a-derived-quantity-by-simple-addition-of-absolute-or/) (4 papers) — 10 · 90.9% - [1 understand and explain the effects of systematic errors (including zero errors) and random errors in measurements](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/errors-and-uncertainties/1-understand-and-explain-the-effects-of-systematic-errors-including-zero-errors-and/) (1 papers) — 1 · 9.1% ## 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 understand and explain the effects of systematic errors (including zero errors) and random errors in measurements](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/errors-and-uncertainties/1-understand-and-explain-the-effects-of-systematic-errors-including-zero-errors-and/)** | 1 | 1 | 1 | 2026 | [Open topic questions](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/errors-and-uncertainties/1-understand-and-explain-the-effects-of-systematic-errors-including-zero-errors-and/) | | **[3 assess the uncertainty in a derived quantity by simple addition of absolute or percentage uncertainties](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/errors-and-uncertainties/3-assess-the-uncertainty-in-a-derived-quantity-by-simple-addition-of-absolute-or/)** | 6 | 4 | 10 | 2025–2026 | [Open topic questions](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/errors-and-uncertainties/3-assess-the-uncertainty-in-a-derived-quantity-by-simple-addition-of-absolute-or/) | ## Browse every topic question - [1 understand and explain the effects of systematic errors (including zero errors) and random errors in measurements](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/errors-and-uncertainties/1-understand-and-explain-the-effects-of-systematic-errors-including-zero-errors-and/) — 1 question items · 1 papers — 1 marks · 2026 - [3 assess the uncertainty in a derived quantity by simple addition of absolute or percentage uncertainties](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/errors-and-uncertainties/3-assess-the-uncertainty-in-a-derived-quantity-by-simple-addition-of-absolute-or/) — 6 question items · 4 papers — 10 marks · 2025–2026 ## Other topics in 9702 P2 - [Atoms, nuclei and radiation 30 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/atoms-nuclei-and-radiation/) - [Density and pressure 13 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/density-and-pressure/) - [Diffraction 5 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/diffraction/) - [Doppler effect for sound waves 1 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/doppler-effect-for-sound-waves/) - [Elastic and plastic behaviour 9 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/elastic-and-plastic-behaviour/) - [Electric current 6 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/electric-current/) - [Electromagnetic spectrum 5 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/electromagnetic-spectrum/) - [Energy conservation 22 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/energy-conservation/) - [Equations of motion 30 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/equations-of-motion/) - [Equilibrium of forces 22 question items](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/equilibrium-of-forces/) ## Topic question rules and edge cases **How many subtopics does Errors and uncertainties contain?** This page lists 2 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. --- Full page with native tables, bar charts and Practice Hub links: https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/errors-and-uncertainties/