# Topic Questions: • identify possible sources of uncertainty and/or systematic error and explain how these may be reduced or eliminated — WPH13 Planning > 49 WPH13 Planning topic questions (116 marks) on identify possible sources of uncertainty and/or… — 22 papers, 2019–2026. Open the exact question in the… - Canonical HTML: https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/planning/identify-possible-sources-of-uncertainty-and-or-systematic-error-and-explain-how/ - Markdown mirror: https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/planning/identify-possible-sources-of-uncertainty-and-or-systematic-error-and-explain-how/index.md --- Edexcel IAL · Physics · WPH13 · Planning 49 WPH13 Planning topic questions are tagged to this syllabus point across 22 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. - 49 topic questions - 22 papers - 116 tagged marks - 28.3% of topic questions - 29.5% of topic marks - 2019–2026 - Syllabus 2018–current - [All WPH13 Planning topic questions](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/planning/) - [All paper codes](https://www.examsci.com/topics/) Core finding **This Planning syllabus point appears in 22 WPH13 papers across 2019–2026, contributing 49 topic questions and 116 marks.** The most recent appearance is WPH13/01 January 2026. That equals 28.3% of the 173 topic questions and 29.5% of the 393 marks tagged to Planning. 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-1) | **Q1** Energy Transfer Investigation - Edexcel IAL Physics Jan 2026 Q1 | FRQ | 1 of 4 parts ((a)(ii)) | 2 of 9 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=8d01f9b7-8e30-48ac-a430-6de766cef2b0&question_id=9e7ecfea-9e44-4b0f-9885-2af5718dc93a&source_detail=WPH13%2F01+January+2026) | | [**WPH13/01** January 2026 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2026-january-wph13-01/#q-2) | **Q2** Pulse-Echo Technique Distance Determination - Edexcel IAL Physics Jan 2026 Q2 | FRQ | 1 of 8 parts ((a)(iii)) | 2 of 16 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=8d01f9b7-8e30-48ac-a430-6de766cef2b0&question_id=09025db0-555c-488e-95d0-21aeea42cc69&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-3) | **Q3** Air Track Glider Collision Analysis - Edexcel IAL Physics Jan 2026 Q3 | FRQ | 2 of 6 parts ((c), (d)) | 5 of 15 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=0e15e7f0-76ca-4122-bd1d-b46bf135a7c9&question_id=63e29481-9db5-4545-8705-c0d039b297f7&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-1) | **Q1** Micrometer Screw Gauge and Uncertainty - Edexcel IAL Physics Oct 2025 Q1 | FRQ | 1 of 4 parts ((b)) | 2 of 8 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=c0aadfb9-2632-4fe0-9c0d-03b56e3212b2&question_id=182fdcbc-4f2e-4a5f-bafb-5fd3d57daaf8&source_detail=WPH13%2F01+October+2025) | | [**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 ((a)(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) | | [**WPH13/01** October 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2025-october-wph13-01/#q-3) | **Q3** Strain Gauge Characteristics - Edexcel IAL Physics Oct 2025 Q3 | FRQ | 1 of 5 parts ((b)(i)) | 2 of 12 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=c0aadfb9-2632-4fe0-9c0d-03b56e3212b2&question_id=e623c29e-a8b9-48ea-9ee3-3cbd4c53a18a&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-1) | **Q1** Thickness and Density of Paper - Edexcel IAL Physics Unit 3 Oct 2025 Q1 | FRQ | 2 of 5 parts ((a)(i), (b)(iii)) | 5 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=002112a6-a745-40d7-be73-302abd93187e&question_id=e9896af4-9feb-4e5b-8a42-38989e01d0d9&source_detail=WPH13%2F02+October+2025) | | [**WPH13/01** June 2025 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2025-june-wph13-01/#q-4) | **Q4** Speed of Sound in Air - Edexcel IAL Physics Unit 3 June 2025 Q4 | FRQ | 1 of 6 parts ((a)) | 2 of 17 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=7df7c7c2-50ad-42f0-85d6-ccf3f07614ab&question_id=0ccfff3d-942a-426e-b17e-602b8f3511db&source_detail=WPH13%2F01+June+2025) | | [**WPH13/01** October 2024 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2024-october-wph13-01/#q-1) | **Q1** Viscosity of a Liquid - Edexcel IAL Physics Oct 2024 Unit 3 Q1 | FRQ | 1 of 5 parts ((a)(ii)) | 2 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=719faec4-3ae4-45e2-b42d-df14b4d16b1e&question_id=2a515870-9b42-4c8d-bcb1-736f037985d5&source_detail=WPH13%2F01+October+2024) | | [**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 | 2 of 5 parts ((b), (c)(ii)) | 4 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)(i)) | 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-2) | **Q2** Railway Safety System Model - Edexcel IAL Physics Oct 2023 Q2 | FRQ | 1 of 4 parts ((a)) | 4 of 11 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=a0875d97-cce0-4bf9-b7a9-0c3ef254e878&question_id=787b1fd9-490e-4a8d-9353-af34bbbcf328&source_detail=WPH13%2F01+October+2023) | | [**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-1) | **Q1** Thickness and Mass of a Ruler - Edexcel IAL Physics June 2023 Q1 | FRQ | 1 of 4 parts ((a)(iii)) | 2 of 9 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=8a34ceab-1004-4784-8d96-470e76c88436&question_id=37f9e664-57ea-46c2-a2bd-b644b3457845&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)(i)) | 2 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-1) | **Q1** Graphite Pencil Resistance - Edexcel IAL Physics Jan 2023 Q1 | FRQ | 1 of 4 parts ((b)(ii)) | 1 of 8 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=a6f19e12-60ad-4fcb-a01a-059cf8192681&question_id=92d038d6-0234-4f61-ac4a-79ee9944f2a5&source_detail=WPH13%2F01+January+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-1) | **Q1** Glider Collision - Edexcel IAL Physics Oct 2022 Q1 | FRQ | 2 of 6 parts ((c), (d)) | 5 of 15 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=6442a3d0-c94a-4578-83c9-cdc721b9cadf&question_id=11b74f9d-9bb2-4308-accc-c3b2315047c5&source_detail=WPH13%2F01+October+2022) | | [**WPH13/01** October 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2022-october-wph13-01/#q-3) | **Q3** Liquid Converging Lens - Edexcel IAL Physics Oct 2022 Q3 | FRQ | 1 of 4 parts ((a)(ii)) | 2 of 10 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=6442a3d0-c94a-4578-83c9-cdc721b9cadf&question_id=077b9c17-1588-43da-a6b5-ac77b9849fd2&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) | | [**WPH13/01** June 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2022-june-wph13-01/#q-3) | **Q3** LDR Resistance and Light Intensity Investigation - Edexcel IAL Physics Unit 3 June 2022 Q3 | FRQ | 1 of 6 parts ((b)) | 3 of 12 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e38f0c8e-5e95-4bb5-b2e9-2a6e17ae94dc&question_id=6dacbf35-fc8f-40c1-94d5-47d699ffcaac&source_detail=WPH13%2F01+June+2022) | | [**WPH13/01** January 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2022-january-wph13-01/#q-2) | **Q2** Filament Bulb and LDR - Edexcel IAL Physics Unit 3 Jan 2022 Q2 | FRQ | 1 of 3 parts ((c)) | 1 of 7 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=7a188e51-aa68-4a1f-8490-4d847ae5e05e&question_id=811b8e97-a69a-45f5-9a56-9cf7d12fb9bc&source_detail=WPH13%2F01+January+2022) | | [**WPH13/01** January 2022 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2022-january-wph13-01/#q-4) | **Q4** Resistance of Silicon Slices - Edexcel IAL Physics Unit 3 Jan 2022 Q4 | FRQ | 1 of 4 parts ((b)(i)) | 2 of 13 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=7a188e51-aa68-4a1f-8490-4d847ae5e05e&question_id=5f70db34-dc82-4533-8316-f83441aee84e&source_detail=WPH13%2F01+January+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-1) | **Q1** Ball Bounce Height vs Temperature - Edexcel IAL Physics Jan 2022 Q1 | FRQ | 3 of 8 parts ((a)(ii), (f)(i), (f)(ii)) | 4 of 14 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=2f547a43-85bd-434c-905c-6bbb0137b0e9&question_id=d55c36df-657c-453a-86f4-fe609c2a771c&source_detail=WPH13%2F02+January+2022) | | [**WPH13/01** October 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2021-october-wph13-01/#q-4) | **Q4** Coefficient of Restitution - Edexcel IAL Physics Oct 2021 Q4 | FRQ | 1 of 6 parts ((d)) | 2 of 17 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e7d035eb-346b-431d-b65e-0557dcdf57f7&question_id=67a11b80-a142-4281-ac65-ac525a677672&source_detail=WPH13%2F01+October+2021) | | [**WPH13/01** June 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2021-june-wph13-01/#q-1) | **Q1** Density of Acetate - June 2021 Unit 3 Q1 | FRQ | 1 of 3 parts ((b)) | 4 of 7 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=c9eff551-25f7-4fac-9fe6-e0317c332f88&question_id=4068442c-ef0c-444a-a514-fe33a44f88ee&source_detail=WPH13%2F01+June+2021) | | [**WPH13/01** June 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2021-june-wph13-01/#q-2) | **Q2** Speed of Sound in Air - June 2021 Unit 3 Q2 | FRQ | 1 of 5 parts ((a)) | 2 of 10 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=c9eff551-25f7-4fac-9fe6-e0317c332f88&question_id=19ba7fa0-4e25-416e-9d0d-a8f0bc37fdd2&source_detail=WPH13%2F01+June+2021) | | [**WPH13/01** January 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2021-january-wph13-01/#q-2) | **Q2** Refractive Index and Critical Angle of a Semicircular Block - Edexcel IAL Physics Jan 2021 Q2 | FRQ | 2 of 6 parts ((d), (e)) | 6 of 14 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=d9668e24-eb26-4252-ba1c-40c6549c6ec4&question_id=17bc0c1b-3e41-4d0d-b82a-939540a36203&source_detail=WPH13%2F01+January+2021) | | [**WPH13/01** January 2021 · Edexcel IAL](https://www.examsci.com/past-papers/edexcel-ial/physics/physics-unit-3-wph13/2021-january-wph13-01/#q-4) | **Q4** Percentage Uncertainty of Voltmeter Readings - Edexcel IAL Physics Jan 2021 Q4 | FRQ | 1 of 2 parts ((b)) | 3 of 4 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=d9668e24-eb26-4252-ba1c-40c6549c6ec4&question_id=1530c71e-a2d9-49cd-aee4-67a689493994&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 ((b)) | 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** 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-1) | **Q1** Echolocation and Reaction Time - Edexcel IAL Physics Oct 2019 Q1 | FRQ | 1 of 5 parts ((a)) | 1 of 13 on the paper | Easy | [Go to Practice Hub](https://www.examsci.com/practice?set_id=a2ba1169-afda-42ed-bc19-c97649f475d5&question_id=8e1ec939-5056-4319-bf11-d2d401d5cf7e&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-2) | **Q2** Projectile Launcher Experiment - Edexcel IAL Physics Oct 2019 Q2 | FRQ | 1 of 2 parts ((b)) | 2 of 6 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=a2ba1169-afda-42ed-bc19-c97649f475d5&question_id=fdfdb7a7-8e17-4a03-8eae-4bdcabd61253&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-4) | **Q4** Sucrose Solution Polarisation - Edexcel IAL Physics Oct 2019 Q4 | FRQ | 1 of 3 parts ((b)) | 3 of 9 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=a2ba1169-afda-42ed-bc19-c97649f475d5&question_id=d889e3d0-1b16-419e-b651-2dcf38a409d1&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-1) | **Q1** Micrometer Screw Gauge Measurements on Sphere - Edexcel IAL Physics June 2019 Q1 | FRQ | 2 of 8 parts ((a)(ii), (c)) | 4 of 16 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=279b66f0-edd7-451f-b995-9b128999bdec&question_id=cab97b94-92d2-4ac1-a3b1-977200319f4e&source_detail=WPH13%2F01+June+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-2) | **Q2** Stiffness of a Spring - Edexcel IAL Physics June 2019 Q2 | FRQ | 1 of 2 parts ((a)) | 4 of 6 on the paper | Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=279b66f0-edd7-451f-b995-9b128999bdec&question_id=a8ac371a-1c2d-4eff-a43c-e00d154b04b0&source_detail=WPH13%2F01+June+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 | 2 of 3 parts ((b)(i), (b)(ii)) | 6 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 Planning - [• comment on the implications of physics (e.g. benefits/risks) and on its context (e.g. social/environmental/historical).](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/planning/comment-on-the-implications-of-physics-e-g-benefits-risks-and-on-its-context-e-g/) — 6 question items · 6 papers — 13 marks · 2020–2025 - [• describe how to measure relevant variables using the most appropriate instrument and correct measuring techniques](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/planning/describe-how-to-measure-relevant-variables-using-the-most-appropriate-instrument-and/) — 67 question items · 23 papers — 188 marks · 2019–2026 - [• discuss calibration of instruments, e.g. whether a meter reads zero before measurements are made](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/planning/discuss-calibration-of-instruments-e-g-whether-a-meter-reads-zero-before-measurements/) — 12 question items · 10 papers — 22 marks · 2019–2026 - [• discuss how the data collected will be used](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/planning/discuss-how-the-data-collected-will-be-used/) — 10 question items · 10 papers — 29 marks · 2020–2026 - [• discuss whether repeat readings are appropriate](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/planning/discuss-whether-repeat-readings-are-appropriate/) — 9 question items · 9 papers — 26 marks · 2019–2025 - [• identify and state how to control all other relevant variables to make it a fair test](https://www.examsci.com/topics/edexcel-ial/physics/physics-unit-3-wph13/planning/identify-and-state-how-to-control-all-other-relevant-variables-to-make-it-a-fair-test/) — 17 question items · 11 papers — 29 marks · 2020–2026 ## Topic question rules and edge cases **How many topic questions cover this syllabus point?** 40 question stems cover this subtopic across 22 papers, but only 49 tagged parts and 116 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/planning/identify-possible-sources-of-uncertainty-and-or-systematic-error-and-explain-how/