# Topic Questions: 29b understand the terms limit of proportionality, elastic limit, yield point, elastic deformation and plastic deformation and be able to apply them to these graphs — WPH11 Materials > 26 WPH11 Materials topic questions (42 marks) on 29b understand the terms limit of… — 17 papers, 2019–2026. Open the exact question in the original paper. - Canonical HTML: https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/materials/29b-understand-the-terms-limit-of-proportionality-elastic-limit-yield-point-elastic/ - Markdown mirror: https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/materials/29b-understand-the-terms-limit-of-proportionality-elastic-limit-yield-point-elastic/index.md --- Edexcel IAL · Physics · WPH11 · Materials 26 WPH11 Materials 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. - 26 topic questions - 17 papers - 42 tagged marks - 9.2% of topic questions - 5.9% of topic marks - 2019–2026 - Syllabus 2018–current - [All WPH11 Materials topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/materials/) - [All paper codes](https://www.examsci.com/topics/) Core finding **This Materials syllabus point appears in 17 WPH11 papers across 2019–2026, contributing 26 topic questions and 42 marks.** The most recent appearance is WPH11/02 January 2026. That equals 9.2% of the 282 topic questions and 5.9% of the 713 marks tagged to Materials. 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 | | --- | --- | --- | --- | --- | --- | --- | | [**WPH11/02** January 2026 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2026-january-wph11-02/#q-3) | **Q3** Stress-Strain Graphs - Edexcel IAL Physics Jan 2026 Q3 | MCQ | MCQ · 1 part | 1 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=a80f5748-5313-4f69-a34e-e8d485474f9c&question_id=135691bd-ebc5-4f29-ba6e-3f5a78cf66ed&source_detail=WPH11%2F02+January+2026) | | [**WPH11/01** June 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2025-june-wph11-01/#q-15) | **Q15** Brick Strain Energy and Deformation - Edexcel IAL Physics Jun 2025 Q15 | FRQ | 1 of 2 parts ((b)) | 1 of 4 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=2a1cdf33-a9db-4ce2-b66a-788f175d980c&question_id=518d976f-c060-4366-9fa4-51eefd8f8417&source_detail=WPH11%2F01+June+2025) | | [**WPH11/01** January 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2025-january-wph11-01/#q-4) | **Q4** Elastic Limit of a Spring - Edexcel IAL Physics Jan 2025 Q4 | MCQ | MCQ · 1 part | 1 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=ec128daf-6502-434e-a88b-2c3dad32a1bd&question_id=987e9319-3e76-43e2-a85e-06508f3ebc2e&source_detail=WPH11%2F01+January+2025) | | [**WPH11/01** October 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2024-october-wph11-01/#q-7) | **Q7** Wire Behavior at Elastic Limit - Edexcel IAL Physics Oct 2024 Q7 | MCQ | MCQ · 1 part | 1 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=abf33b21-e4d9-4ff8-ad87-235e71deb7e0&question_id=4cd1b6eb-ec56-4f77-8174-bc66897cfeff&source_detail=WPH11%2F01+October+2024) | | [**WPH11/01** October 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2024-october-wph11-01/#q-18) | **Q18** Properties of Spider Silk and Steel - Edexcel IAL Physics Oct 2024 Q18 | FRQ | 1 of 4 parts ((c)(i)) | 2 of 12 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=abf33b21-e4d9-4ff8-ad87-235e71deb7e0&question_id=878d3f52-26d7-4e6e-97df-f711587a6d0b&source_detail=WPH11%2F01+October+2024) | | [**WPH11/01** January 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2024-january-wph11-01/#q-7) | **Q7** Spring Stiffness from Length-Force Graph - Edexcel IAL Physics Jan 2024 Q7 | MCQ | MCQ · 1 part | 1 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=230a3ed8-7572-4cb0-87e1-cead15943437&question_id=a48645dd-6a67-4adb-a6b2-2cafed212ed1&source_detail=WPH11%2F01+January+2024) | | [**WPH11/01** January 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2024-january-wph11-01/#q-11) | **Q11** Rubber Band Force-Extension and Elastic Deformation - Edexcel IAL Physics Jan 2024 Q11 | FRQ | 1 of 2 parts ((a)) | 1 of 4 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=230a3ed8-7572-4cb0-87e1-cead15943437&question_id=8749de14-52fb-40b2-bfc9-6ca2a8289b35&source_detail=WPH11%2F01+January+2024) | | [**WPH11/01** October 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2023-october-wph11-01/#q-3) | **Q3** Elastic Limit definition - Edexcel IAL Physics Oct 2023 Q3 | MCQ | MCQ · 1 part | 1 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=15e3f88f-24f6-422e-8f4a-6de82da3ed98&question_id=d76f1f0d-41fe-43c4-964b-024135c69148&source_detail=WPH11%2F01+October+2023) | | [**WPH11/01** June 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2023-june-wph11-01/#q-20) | **Q20** Actor Harness: Yield Point, Tension and Stress - Edexcel IAL Physics Unit 1 Summer 2023 Q20 | FRQ | 1 of 5 parts ((a)) | 1 of 14 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=dc6d3961-d2d0-430e-815a-816bfd3cb268&question_id=cdc95180-9829-4096-9717-4aad0ac5815a&source_detail=WPH11%2F01+June+2023) | | [**WPH11/01** January 2023 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2023-january-wph11-01/#q-14) | **Q14** Stress, Strain and Young Modulus - Edexcel IAL Physics Jan 2023 Q14 | FRQ | 1 of 3 parts ((a)) | 1 of 7 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=9b8108c7-40af-4a33-b373-0ba0dae27340&question_id=2465c19f-a598-40b0-838a-277b6f3a87ff&source_detail=WPH11%2F01+January+2023) | | [**WPH11/01** October 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2022-october-wph11-01/#q-12) | **Q12** Young Modulus of Constantan - Edexcel IAL Physics Oct 2022 Q12 | FRQ | 1 of 3 parts ((b)(i)) | 2 of 7 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e613f67e-77fc-4141-8190-504991cfb0ac&question_id=bda42469-9497-4005-be30-e2f58fb71954&source_detail=WPH11%2F01+October+2022) | | [**WPH11/01** June 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2022-june-wph11-01/#q-12) | **Q12** Steel Cable Strain and Stress - Edexcel IAL Physics Jun 2022 Q12 | FRQ | 1 of 3 parts ((a)) | 1 of 5 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=a4a954db-f07e-437a-8405-65316f754d19&question_id=69f844ca-2d48-4160-9016-5d951d9646a2&source_detail=WPH11%2F01+June+2022) | | [**WPH11/01** October 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2021-october-wph11-01/#q-14) | **Q14** Young Modulus of Stainless Steel - Edexcel IAL Physics Oct 2021 Q14 | FRQ | 2 of 4 parts ((a), (b)(i)) | 3 of 9 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=c6a436cd-ce2e-4b48-9819-5ec3a7ae39c6&question_id=89ab2673-4927-4552-a81f-4e4e2115f719&source_detail=WPH11%2F01+October+2021) | | [**WPH11/01** June 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2021-june-wph11-01/#q-9) | **Q9** Copper Tensile Stress-Strain Graph - Edexcel IAL Physics Jun 2021 Q9 | MCQ | MCQ · 1 part | 1 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5059932b-1c99-4e4c-90f2-0dc7111b867a&question_id=b9866500-254a-45f4-9d21-8a9d748fd52a&source_detail=WPH11%2F01+June+2021) | | [**WPH11/01** October 2020 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2020-october-wph11-01/#q-16) | **Q16** Spring Extension and Deformations - Edexcel IAL Physics Oct 2020 Q16 | FRQ | 4 of 5 parts ((a)(i), (a)(ii), (a)(iii), (b)) | 5 of 9 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=de7f3e55-de2d-40f1-9868-c21f740ee82c&question_id=2b822ce7-749f-4388-a6ff-30d7c385f082&source_detail=WPH11%2F01+October+2020) | | [**WPH11/01** January 2020 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2020-january-wph11-01/#q-9) | **Q9** Force-Extension Graph Reference Points - Edexcel IAL Physics Jan 2020 Q9 | MCQ | MCQ · 1 part | 1 | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=1a116037-6139-44bc-8f9d-116738b54706&question_id=9c49e0ab-d39f-42be-a8c6-d61c97685a59&source_detail=WPH11%2F01+January+2020) | | [**WPH11/01** January 2020 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2020-january-wph11-01/#q-17) | **Q17** Elastic Cord Glider Experiment - Edexcel IAL Physics Jan 2020 Q17 | FRQ | 1 of 3 parts ((b)) | 2 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=1a116037-6139-44bc-8f9d-116738b54706&question_id=1a0b74d9-f9b5-43f9-b225-13eec4c87c0f&source_detail=WPH11%2F01+January+2020) | | [**WPH11/01** October 2019 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2019-october-wph11-01/#q-16) | **Q16** Concrete and Steel Materials Properties - Edexcel IAL Physics Oct 2019 Q16 | FRQ | 1 of 4 parts ((c)(ii)) | 2 of 11 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=5f3717ec-f750-4f16-a54f-f18cdccc3eb0&question_id=d1f4d63d-30e6-4f98-9d84-8e6078c61580&source_detail=WPH11%2F01+October+2019) | | [**WPH11/01** June 2019 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2019-june-wph11-01/#q-6) | **Q6** Stress-Strain Behavior of Wires - Edexcel IAL Physics Jun 2019 Q6 | MCQ | MCQ · 1 part | 1 | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=9c0ae983-58e3-4d98-b727-ddb00ea25c86&question_id=16646e51-4ace-40cf-a5be-109762e971b2&source_detail=WPH11%2F01+June+2019) | | [**WPH11/01** June 2019 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2019-june-wph11-01/#q-16) | **Q16** Young Modulus of Copper Wire Experiment - Edexcel IAL Physics Jun 2019 Q16 | FRQ | 1 of 3 parts ((b)) | 4 of 13 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=9c0ae983-58e3-4d98-b727-ddb00ea25c86&question_id=bfb6b8a0-4f39-44ed-b549-642764d5b972&source_detail=WPH11%2F01+June+2019) | | [**WPH11/01** June 2019 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2019-june-wph11-01/#q-17) | **Q17** Climbing Rope Fall Factor and Elastic Properties - Edexcel IAL Physics Jun 2019 Q17 | FRQ | 1 of 3 parts ((b)) | 6 of 13 on the paper | Hard | [Go to Practice Hub](https://www.examsci.com/practice?set_id=9c0ae983-58e3-4d98-b727-ddb00ea25c86&question_id=686eb354-4251-400d-9184-4616de8be3ec&source_detail=WPH11%2F01+June+2019) | | [**WPH11/01** January 2019 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-1-wph11/2019-january-wph11-01/#q-17) | **Q17** Properties of Drying Concrete - Edexcel IAL Physics Jan 2019 Q17 | FRQ | 1 of 3 parts ((c)) | 3 of 10 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=34ce4699-61aa-4a3f-abf1-62330761fb43&question_id=2538aa5a-b7a4-4baf-b3cb-00eecbb47c29&source_detail=WPH11%2F01+January+2019) | ## Related topic questions in Materials - [23 be able to use the equation density $\rho=\frac{m}{V}$](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/materials/23-be-able-to-use-the-equation-density-rho-frac-m-v/) — 37 question items · 22 papers — 129 marks · 2019–2026 - [24 understand how to use the relationship upthrust = weight of fluid displaced](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/materials/24-understand-how-to-use-the-relationship-upthrust-weight-of-fluid-displaced/) — 59 question items · 23 papers — 197 marks · 2019–2026 - [25a be able to use the equation for viscous drag (Stokes' Law), $F = 6\pi\eta r v$.](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/materials/25a-be-able-to-use-the-equation-for-viscous-drag-stokes-law-f-6-pi-eta-r-v/) — 60 question items · 23 papers — 158 marks · 2019–2026 - [25b understand that this equation applies only to small spherical objects moving at low speeds with laminar flow (or in the absence of turbulent flow) and that viscosity is temperature dependent](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/materials/25b-understand-that-this-equation-applies-only-to-small-spherical-objects-moving-at/) — 52 question items · 22 papers — 113 marks · 2019–2026 - [26 CORE PRACTICAL 2: Use a falling-ball method to determine the viscosity of a liquid](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/materials/26-core-practical-2-use-a-falling-ball-method-to-determine-the-viscosity-of-a-liquid/) — 14 question items · 8 papers — 33 marks · 2019–2025 - [27 be able to use the Hooke's law equation, $\Delta F=k\Delta x$, where k is the stiffness of the object](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-1-wph11/materials/27-be-able-to-use-the-hooke-s-law-equation-delta-f-k-delta-x-where-k-is-the-stiffness/) — 35 question items · 22 papers — 85 marks · 2019–2026 ## Topic question rules and edge cases **How many topic questions cover this syllabus point?** 22 question stems cover this subtopic across 17 papers, but only 26 tagged parts and 42 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-1-wph11/materials/29b-understand-the-terms-limit-of-proportionality-elastic-limit-yield-point-elastic/