# Topic Questions: • suggest realistic modifications to reduce errors — WPH13 Processing Results > 23 WPH13 Processing Results topic questions (55 marks) on suggest realistic modifications to reduce errors — 17 papers, 2019–2026. Open the exact question… - Canonical HTML: https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/processing-results/suggest-realistic-modifications-to-reduce-errors/ - Markdown mirror: https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/processing-results/suggest-realistic-modifications-to-reduce-errors/index.md --- Edexcel IAL · Physics · WPH13 · Processing Results 23 WPH13 Processing Results topic questions are tagged to this syllabus point across 17 papers (2019–2026). Only the parts whose knowledge graph matches this syllabus statement are counted, and the table shows which parts of each question are involved. - 23 topic questions - 17 papers - 55 tagged marks - 8.1% of topic questions - 7.2% of topic marks - 2019–2026 - Syllabus 2018–current - [All WPH13 Processing Results topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/processing-results/) - [All paper codes](https://www.examsci.com/topics/) Core finding **This Processing Results syllabus point appears in 17 WPH13 papers across 2019–2026, contributing 23 topic questions and 55 marks.** The most recent appearance is WPH13/01 January 2026. That equals 8.1% of the 285 topic questions and 7.2% of the 764 marks tagged to Processing Results. Only parts tagged to this subtopic are counted, so a four-part question can contribute one item and one part's marks. The table lists every matching question, its tagged parts and marks, with a link back to the paper page. Sessions are newest first, so the statement can be traced back through the full paper history. ## Topic questions by session Newest sessions first. Parts and marks count only the parts tagged to this subtopic; “x of y parts” shows how much of the question is tagged elsewhere. Select the paper cell to open the matching question on the paper page, or use **Go to Practice Hub** to answer that exact question in the Interactive Practice Hub. | Paper | Question | Type | Parts | Marks | Difficulty | Practice | | --- | --- | --- | --- | --- | --- | --- | | [**WPH13/01** January 2026 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2026-january-wph13-01/#q-3) | **Q3** Efficiency of an Electric Motor - Edexcel IAL Physics Jan 2026 Q3 | FRQ | 1 of 5 parts ((d)) | 2 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=8d01f9b7-8e30-48ac-a430-6de766cef2b0&question_id=d2ea36c3-2fc9-48f7-a7b0-5608e58d5d06&source_detail=WPH13%2F01+January+2026) | | [**WPH13/02** January 2026 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2026-january-wph13-02/#q-2) | **Q2** LED Light Intensity and Potential Difference - Edexcel IAL Physics Jan 2026 Q2 | FRQ | 1 of 6 parts ((e)) | 2 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0e15e7f0-76ca-4122-bd1d-b46bf135a7c9&question_id=ae583d24-ee8b-40c3-9c8d-abd76b890224&source_detail=WPH13%2F02+January+2026) | | [**WPH13/01** October 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2025-october-wph13-01/#q-2) | **Q2** Microwave Diffraction - Edexcel IAL Physics Oct 2025 Q2 | FRQ | 1 of 4 parts ((b)(ii)) | 2 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=c0aadfb9-2632-4fe0-9c0d-03b56e3212b2&question_id=b9d01c92-2757-4f12-9262-825f8cdb9d2d&source_detail=WPH13%2F01+October+2025) | | [**WPH13/02** October 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2025-october-wph13-02/#q-2) | **Q2** Interference of Sound Waves - Edexcel IAL Physics Unit 3 Oct 2025 Q2 | FRQ | 1 of 6 parts ((b)(i)) | 3 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=002112a6-a745-40d7-be73-302abd93187e&question_id=9061a290-28ec-4f27-9d78-8b3abee5ba4f&source_detail=WPH13%2F02+October+2025) | | [**WPH13/01** June 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2024-june-wph13-01/#q-2) | **Q2** Ball Bouncing from a Slope - Edexcel IAL Physics June 2024 Q2 | FRQ | 1 of 4 parts ((c)) | 2 of 8 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=1ef6bfed-f4ee-4ff7-ad52-31d0c03aa228&question_id=1ddbf345-9d85-48aa-8b5b-74f356e4c24c&source_detail=WPH13%2F01+June+2024) | | [**WPH13/01** January 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2024-january-wph13-01/#q-1) | **Q1** Measurements and Density - Edexcel IAL Physics Jan 2024 Q1 | FRQ | 1 of 5 parts ((c)(ii)) | 2 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=501595e3-ad9f-48ab-ab6e-9341e5c65a58&question_id=e04979fb-ee9c-4cf1-b9b2-c5943385e157&source_detail=WPH13%2F01+January+2024) | | [**WPH13/01** January 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2024-january-wph13-01/#q-3) | **Q3** Diffraction and Diameter of a Hair - Edexcel IAL Physics Jan 2024 Q3 | FRQ | 1 of 6 parts ((b)(ii)) | 2 of 12 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=501595e3-ad9f-48ab-ab6e-9341e5c65a58&question_id=d12895e3-f5b5-40e1-a181-5734f162988d&source_detail=WPH13%2F01+January+2024) | | [**WPH13/01** January 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2024-january-wph13-01/#q-4) | **Q4** Inverse Square Law for Light - Edexcel IAL Physics Jan 2024 Q4 | FRQ | 1 of 6 parts ((a)) | 4 of 18 on the paper | Hard | [Go to Practice Hub](https://www.examsci.com/practice?set_id=501595e3-ad9f-48ab-ab6e-9341e5c65a58&question_id=b6b18eaf-fc99-41b7-b8de-d37ab05198a8&source_detail=WPH13%2F01+January+2024) | | [**WPH13/01** October 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2023-october-wph13-01/#q-4) | **Q4** Photoelectric Effect Investigation - Edexcel IAL Physics Oct 2023 Q4 | FRQ | 1 of 5 parts ((b)) | 5 of 18 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=a0875d97-cce0-4bf9-b7a9-0c3ef254e878&question_id=6c9f7038-c7e8-444e-8389-d33e084b9666&source_detail=WPH13%2F01+October+2023) | | [**WPH13/01** June 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2023-june-wph13-01/#q-3) | **Q3** Electron Diffraction - Edexcel IAL Physics June 2023 Q3 | FRQ | 1 of 7 parts ((b)(iii)) | 2 of 14 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=8a34ceab-1004-4784-8d96-470e76c88436&question_id=4c448c04-6a8c-46b2-b50b-76a94088ec40&source_detail=WPH13%2F01+June+2023) | | [**WPH13/01** June 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2023-june-wph13-01/#q-4) | **Q4** Extension of an Elastic Cord - Edexcel IAL Physics June 2023 Q4 | FRQ | 1 of 7 parts ((b)(ii)) | 1 of 18 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=8a34ceab-1004-4784-8d96-470e76c88436&question_id=9f68c37a-5566-4d98-b5d0-25a5275b6f83&source_detail=WPH13%2F01+June+2023) | | [**WPH13/01** January 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2023-january-wph13-01/#q-4) | **Q4** Motion of a Toy Car - Edexcel IAL Physics Jan 2023 Q4 | FRQ | 1 of 6 parts ((b)) | 2 of 16 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=a6f19e12-60ad-4fcb-a01a-059cf8192681&question_id=9afb5eaa-ab19-4717-9b28-badef7fae6c9&source_detail=WPH13%2F01+January+2023) | | [**WPH13/01** October 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2022-october-wph13-01/#q-4) | **Q4** Bending of a Plastic Beam - Edexcel IAL Physics Oct 2022 Q4 | FRQ | 1 of 7 parts ((d)) | 2 of 17 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=6442a3d0-c94a-4578-83c9-cdc721b9cadf&question_id=677e20dd-9201-4e96-920a-b8623d87d374&source_detail=WPH13%2F01+October+2022) | | [**WPH13/01** June 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2022-june-wph13-01/#q-1) | **Q1** Coin Measurement and Density Analysis - Edexcel IAL Physics Unit 3 June 2022 Q1 | FRQ | 1 of 4 parts ((d)) | 4 of 12 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e38f0c8e-5e95-4bb5-b2e9-2a6e17ae94dc&question_id=fa5691c6-e947-45e6-a551-b985426ec5fd&source_detail=WPH13%2F01+June+2022) | | [**WPH13/01** June 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2022-june-wph13-01/#q-2) | **Q2** Light Refraction and Index - Edexcel IAL Physics Unit 3 June 2022 Q2 | FRQ | 1 of 4 parts ((c)) | 2 of 10 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e38f0c8e-5e95-4bb5-b2e9-2a6e17ae94dc&question_id=342566cc-d3e8-4d1c-a262-7457769f90b7&source_detail=WPH13%2F01+June+2022) | | [**WPH13/02** January 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2022-january-wph13-02/#q-4) | **Q4** Wavelength of Laser Light using Double Slits - Edexcel IAL Physics Jan 2022 Q4 | FRQ | 1 of 6 parts ((b)(ii)) | 2 of 13 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=2f547a43-85bd-434c-905c-6bbb0137b0e9&question_id=5e8d24a1-720a-4323-b745-7deeb512af53&source_detail=WPH13%2F02+January+2022) | | [**WPH13/01** January 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2021-january-wph13-01/#q-5) | **Q5** Temperature Coefficient of Resistance of Copper Wire - Edexcel IAL Physics Jan 2021 Q5 | FRQ | 1 of 4 parts ((d)) | 2 of 15 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=d9668e24-eb26-4252-ba1c-40c6549c6ec4&question_id=203bedc3-38c9-4202-abe4-04a6fe79ec65&source_detail=WPH13%2F01+January+2021) | | [**WPH13/01** October 2020 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2020-october-wph13-01/#q-1) | **Q1** Temperature and Viscosity of Oil - Edexcel IAL Physics June 2020 Q1 | FRQ | 1 of 7 parts ((d)(ii)) | 2 of 9 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e560e478-0590-40db-8356-fbf3e745b587&question_id=0a42d8db-8bc1-4e4a-824e-45bb4d232d41&source_detail=WPH13%2F01+October+2020) | | [**WPH13/01** October 2020 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2020-october-wph13-01/#q-2) | **Q2** LED Potential Difference and Planck Constant - Edexcel IAL Physics June 2020 Q2 | FRQ | 1 of 6 parts ((e)) | 2 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e560e478-0590-40db-8356-fbf3e745b587&question_id=0e22a8b7-5e0c-4318-a820-5bc17cd416be&source_detail=WPH13%2F01+October+2020) | | [**WPH13/01** January 2020 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2020-january-wph13-01/#q-2) | **Q2** Upthrust and Floating Beaker Experiment - Edexcel IAL Physics Jan 2020 Q2 | FRQ | 1 of 3 parts ((c)) | 2 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=1b9afb38-97c4-4903-8f19-243fc9eab228&question_id=6b4cfa30-2066-4546-a191-096b09173baf&source_detail=WPH13%2F01+January+2020) | | [**WPH13/01** October 2019 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2019-october-wph13-01/#q-3) | **Q3** Aluminium Rod Potential Divider - Edexcel IAL Physics Oct 2019 Q3 | FRQ | 1 of 4 parts ((c)) | 2 of 7 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=a2ba1169-afda-42ed-bc19-c97649f475d5&question_id=36fa68aa-a7b9-445c-9fb5-3e57fa017efc&source_detail=WPH13%2F01+October+2019) | | [**WPH13/01** October 2019 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2019-october-wph13-01/#q-5) | **Q5** Photoelectric Effect and Planck Constant - Edexcel IAL Physics Oct 2019 Q5 | FRQ | 1 of 5 parts ((d)) | 2 of 15 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=a2ba1169-afda-42ed-bc19-c97649f475d5&question_id=cba90b9e-d60a-4090-8128-1ae06a917226&source_detail=WPH13%2F01+October+2019) | | [**WPH13/01** June 2019 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2019-june-wph13-01/#q-4) | **Q4** Standing Wave on a String - Edexcel IAL Physics June 2019 Q4 | FRQ | 1 of 3 parts ((b)(ii)) | 4 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=279b66f0-edd7-451f-b995-9b128999bdec&question_id=38d7183a-0a09-4285-acf9-7c65e9cfa210&source_detail=WPH13%2F01+June+2019) | ## Related topic questions in Processing Results - [• comment on significant figures](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/processing-results/comment-on-significant-figures/) — 1 question items · 1 papers — 3 marks · 2024 - [• comment on the number of readings taken](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/processing-results/comment-on-the-number-of-readings-taken/) — 1 question items · 1 papers — 3 marks · 2024 - [• comment on the range of measurements taken](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/processing-results/comment-on-the-range-of-measurements-taken/) — 1 question items · 1 papers — 3 marks · 2024 - [• comment on the relationship obtained from the graph](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/processing-results/comment-on-the-relationship-obtained-from-the-graph/) — 23 question items · 15 papers — 51 marks · 2019–2026 - [• determine the percentage uncertainty in measurements for a single reading using half the resolution of the instrument and from multiple readings using the half range (students are not expected to compound percentage uncertainties).](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/processing-results/determine-the-percentage-uncertainty-in-measurements-for-a-single-reading-using-half/) — 40 question items · 22 papers — 84 marks · 2019–2026 - [• determine the relationship between two variables or determine a constant with the aid of a graph, e.g. by determining the gradient using a large triangle](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/processing-results/determine-the-relationship-between-two-variables-or-determine-a-constant-with-the-aid/) — 67 question items · 23 papers — 178 marks · 2019–2026 ## Topic question rules and edge cases **How many topic questions cover this syllabus point?** 23 question stems cover this subtopic across 17 papers, but only 23 tagged parts and 55 marks belong to it. Other parts of the same questions are assessed under different statements and are excluded from this page. **Which papers include this subtopic?** The table lists every matching session from 2019–2026. Each row links to the question anchor on the paper page, where the full paper context and practice entry point are available. **Why can one question appear under several subtopics?** The parts of one question can assess different syllabus statements. Each part is counted under its own subtopics, so the same question stem can appear on several subtopic pages while each page lists only the parts and marks tagged to that statement. **Can I practise these questions with AI marking?** Yes. Open a paper from the table and use the Interactive Practice Hub entry point. The page itself is static HTML so search engines and retrieval agents can read the full question list without executing JavaScript. --- Full page with native tables, bar charts and Practice Hub links: https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/processing-results/suggest-realistic-modifications-to-reduce-errors/