# 9702/12 March 2019

> 9702/12 March 2019: 40 questions, 40 marks. Difficulty 0.35, deviation 0.12, algebraic 0.29, text density 0.37. CIE IAL Physics 9702 P1.

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CIE IAL · Physics · 2019 March

This Physics 9702 Paper 1 (Multiple Choice) paper contains 40 questions worth 40 marks. The profile below reports five mark-weighted difficulty and complexity measures, and every question row repeats them. Full question text and mark scheme open in the Interactive Practice Hub.

- CIE IAL
- 9702 P1
- 40 questions
- 40 marks
- Free paper
- [Practise this paper](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa)
- [All 9702 P1 papers](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/)

Core finding

**9702/12 March 2019 is a past paper for CIE IAL Physics 9702 Paper 1 (Multiple Choice), with 40 questions worth 40 marks.** Its mark-weighted Difficulty Measure is 0.35 on a 0.20–0.75 scale, with a Difficulty Deviation of 0.12 and a mark split of 40.0% Easy, 60.0% Medium and 0.0% Hard. Algebraic complexity averages 0.29; text density and modelling average 0.37. All five measures use 40 part-level tags, not candidate results. Every question row below repeats them and opens the Interactive Practice Hub for that question.

## Difficulty & complexity profile

All five measures are mark-weighted and calculated from 40 parts carrying 40 part marks. Difficulty tags cover 40 parts, algebraic tags 40 and text-density tags 40. Tags are internal metadata, not official exam-board ratings.

- **Difficulty Measure**: 0.35 — 0.20–0.75 · nearer Medium
- **Difficulty Deviation**: 0.12 — 0 = uniform; higher = more mixed
- **Difficulty Ratio**: 40.0 / 60.0 / 0.0 — % Easy / Medium / Hard
- **Algebraic Complexity Measure**: 0.29 — 0.20–0.75 · nearer Low
- **Text Density and Modelling Measure**: 0.37 — 0.20–0.75 · nearer Medium

Scale: Easy 0.20 · Medium 0.45 · Hard 0.75, and Low 0.20 · Medium 0.45 · High 0.75 for the two complexity measures. [How each band is defined and how the values are calculated →](https://www.examsci.com/guides/difficulty-and-complexity-measures/)

### Definitions and calculation

| Measure | Paper value | Formula |
| --- | --- | --- |
| **Difficulty Measure** | 0.35 | Σ(d_i × w_i) / Σw_i, with d = 0.20 / 0.45 / 0.75 |
| **Difficulty Deviation** | 0.12 | √(Σw_i(d_i − μ)^2 / Σw_i) |
| **Difficulty Ratio** | 40.0% Easy / 60.0% Medium / 0.0% Hard | marks in band / all tagged marks |
| **Algebraic Complexity Measure** | 0.29 | Σ(c_i × marks_i) / Σmarks_i, with c = 0.20 / 0.45 / 0.75 |
| **Text Density and Modelling Measure** | 0.37 | Σ(t_i × marks_i) / Σmarks_i, with t = 0.20 / 0.45 / 0.75 |

w_i equals the part marks, except for a Hard part worth 4 or more marks, where w_i = marks^0.75 to offset the accessible starter steps inside long structured questions.

## Question list

Each measure is recalculated from the parts of that question and uses the same weights as the paper profile.

| Question | Topic | Marks | Difficulty Measure | Algebraic Complexity Measure | Text Density and Modelling Measure | Practice |
| --- | --- | --- | --- | --- | --- | --- |
| **Q1** FRQ | [1.2 SI units](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/si-units/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=1ffa8b54-4d5b-4eab-82a7-dd84122bb353&source_detail=9702%2F12+March+2019) |
| **Q2** FRQ | [1.2 SI units](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/si-units/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=65c6ec93-8c76-4c90-8607-5a7c53863526&source_detail=9702%2F12+March+2019) |
| **Q3** FRQ | [1.4 Scalars and vectors](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/scalars-and-vectors/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=4563ab66-05b6-4a73-9669-e00387b4b60d&source_detail=9702%2F12+March+2019) |
| **Q4** FRQ | [2.1 Measurements](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=da51b9cd-1dbd-4d81-bc06-6cdfcfdd1c47&source_detail=9702%2F12+March+2019) |
| **Q5** FRQ | [2.2 Errors and uncertainties](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/errors-and-uncertainties/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=988c0ac9-85f2-49e3-b20e-4ea2369b2f94&source_detail=9702%2F12+March+2019) |
| **Q6** FRQ | [3.1 Equations of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equations-of-motion/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=518d7ee4-af68-40f2-8671-95603f9887b0&source_detail=9702%2F12+March+2019) |
| **Q7** FRQ | [3.1 Equations of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equations-of-motion/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=90d108e3-9192-42ed-9bcc-f1d2f6248d0c&source_detail=9702%2F12+March+2019) |
| **Q8** FRQ | [4.3 Linear momentum and its conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/linear-momentum-and-its-conservation/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=53cba34c-694e-43ff-9f2b-41592e455483&source_detail=9702%2F12+March+2019) |
| **Q9** FRQ | [4.2 Non-uniform motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/non-uniform-motion/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=24da95f1-3b1c-428d-9eaa-f7bdad5a414a&source_detail=9702%2F12+March+2019) |
| **Q10** FRQ | [4.3 Linear momentum and its conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/linear-momentum-and-its-conservation/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=dd555910-95ed-4f85-b5c2-d73d2397750e&source_detail=9702%2F12+March+2019) |
| **Q11** FRQ | [5.1 Types of force](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=ef0f0267-2951-4e2b-89d6-0128d5aa5bd4&source_detail=9702%2F12+March+2019) |
| **Q12** FRQ | [5.2 Turning effects of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/turning-effects-of-forces/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=799b8a52-452f-4672-b4c0-b5e1afd88087&source_detail=9702%2F12+March+2019) |
| **Q13** FRQ | [5.2 Turning effects of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/turning-effects-of-forces/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=7270a205-fdcc-4321-bf2d-72cb1143bd46&source_detail=9702%2F12+March+2019) |
| **Q14** FRQ | [5.4 Density and pressure](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/density-and-pressure/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=fa4da7b7-0740-4507-8fde-7e6b25b46e0e&source_detail=9702%2F12+March+2019) |
| **Q15** FRQ | [6.1 Energy conversion and conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=5103f457-d413-47bd-818c-c1a729856690&source_detail=9702%2F12+March+2019) |
| **Q16** FRQ | [6.2 Work and efficiency](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=f373cf6f-b53e-4acd-b4ae-655a295c8dfe&source_detail=9702%2F12+March+2019) |
| **Q17** FRQ | [6.2 Work and efficiency](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=38f6a309-7a39-453e-9ec2-dba8e9dd4e82&source_detail=9702%2F12+March+2019) |
| **Q18** FRQ | [6.4 Power](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=1abf0e47-2306-4a44-980c-635ae9245963&source_detail=9702%2F12+March+2019) |
| **Q19** FRQ | [9.1 Stress and strain](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/stress-and-strain/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=5cd4ec32-4370-4c60-8368-ead653a1faca&source_detail=9702%2F12+March+2019) |
| **Q20** FRQ | [9.1 Stress and strain](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/stress-and-strain/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=27e8e83d-a47e-4e8f-9802-cf77ea627ff9&source_detail=9702%2F12+March+2019) |
| **Q21** FRQ | [9.2 Elastic and plastic behaviour](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/elastic-and-plastic-behaviour/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=b9df08a2-363a-4f9b-9d5c-612f7bbc60bb&source_detail=9702%2F12+March+2019) |
| **Q22** FRQ | [14.1 Progressive waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/progressive-waves/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=5229d3ed-355d-4b58-bd14-171c7e9f7d0d&source_detail=9702%2F12+March+2019) |
| **Q23** FRQ | [14.1 Progressive waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/progressive-waves/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=40a87cf7-4f4f-4999-962b-b6a31e7c03b0&source_detail=9702%2F12+March+2019) |
| **Q24** FRQ | [15.1 Stationary waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/stationary-waves/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=968f9813-6c25-4897-93c8-6519a35ef277&source_detail=9702%2F12+March+2019) |
| **Q25** FRQ | [14.4 Doppler effect](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=4a39074f-8e03-4b1e-a4fa-6fc5a32248ee&source_detail=9702%2F12+March+2019) |
| **Q26** FRQ | [14.5 Electromagnetic spectrum](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/electromagnetic-spectrum/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=1f299416-687a-4ff8-b153-7b59c2457934&source_detail=9702%2F12+March+2019) |
| **Q27** FRQ | [15.1 Stationary waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/stationary-waves/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=5864662c-70ad-4688-8c06-a003d0665657&source_detail=9702%2F12+March+2019) |
| **Q28** FRQ | [15.3 Interference, two-source interference](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=9968bf7d-8d43-4974-abb1-fabf44c2d5f4&source_detail=9702%2F12+March+2019) |
| **Q29** FRQ | [15.4 Diffraction gratings](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.45 Medium | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=99e8a680-a0ae-4406-962a-a29ee9bd47c5&source_detail=9702%2F12+March+2019) |
| **Q30** FRQ | [17.1 Concept of an electric field](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=3f8df05e-2e70-4894-be97-ca86a60ec412&source_detail=9702%2F12+March+2019) |
| **Q31** FRQ | [17.1 Concept of an electric field](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=6f260529-9654-40a5-b8f9-a637b45570c3&source_detail=9702%2F12+March+2019) |
| **Q32** FRQ | [19.1 Electric current](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/electric-current/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=0c6f42a7-91b9-4673-82cb-9711c466cc76&source_detail=9702%2F12+March+2019) |
| **Q33** FRQ | [19.2 Potential difference and power](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/potential-difference-and-power/) | 1 | 0.45 Medium | 0.45 Medium | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=b5a0d21b-ad87-4c4a-bbbc-52e02612dfef&source_detail=9702%2F12+March+2019) |
| **Q34** FRQ | [19.3 Resistance and resistivity](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/resistance-and-resistivity/) | 1 | 0.45 Medium | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=2b542e0c-ea68-49a5-aed2-8a7720a48b54&source_detail=9702%2F12+March+2019) |
| **Q35** FRQ | [19.3 Resistance and resistivity](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/resistance-and-resistivity/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=ee1e4353-1519-444f-bab0-dbe7ec3093d0&source_detail=9702%2F12+March+2019) |
| **Q36** FRQ | [20.1 Practical circuits](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/practical-circuits/) | 1 | 0.45 Medium | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=ca2aeb26-8983-4bd0-9935-a6e2b4634f3a&source_detail=9702%2F12+March+2019) |
| **Q37** FRQ | [20.2 Kirchhoff’s laws](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/kirchhoff-s-laws/) | 1 | 0.45 Medium | 0.45 Medium | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=e19b1ec9-5634-4a9f-8486-5db985957385&source_detail=9702%2F12+March+2019) |
| **Q38** FRQ | [20.3 Potential dividers](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/potential-dividers/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=03b7f834-c34a-4817-a701-678bd3944c6a&source_detail=9702%2F12+March+2019) |
| **Q39** FRQ | [26.1 Atoms, nuclei and radiation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/atoms-nuclei-and-radiation/) | 1 | 0.20 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=25d38b43-f226-443e-a2cb-759650ae9466&source_detail=9702%2F12+March+2019) |
| **Q40** FRQ | [26.1 Atoms, nuclei and radiation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/atoms-nuclei-and-radiation/) | 1 | 0.20 Easy | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=e3207e31-5611-4060-bd2f-92a44bc014aa&question_id=fa6d9abb-379a-4fce-b683-4142037963a7&source_detail=9702%2F12+March+2019) |

## Topics in this paper

- [1.2 SI units](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/si-units/)
- [14.1 Progressive waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/progressive-waves/)
- [1.4 Scalars and vectors](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/scalars-and-vectors/)
- [2.1 Measurements](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/)
- [2.2 Errors and uncertainties](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/errors-and-uncertainties/)
- [3.1 Equations of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equations-of-motion/)
- [4.3 Linear momentum and its conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/linear-momentum-and-its-conservation/)
- [4.2 Non-uniform motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/non-uniform-motion/)
- [5.1 Types of force](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/)
- [6.3 Potential energy and kinetic energy](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/)
- [5.3 Equilibrium of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/equilibrium-of-forces/)
- [5.2 Turning effects of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-1/turning-effects-of-forces/)

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- [9702/12](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2019-october-november-9702-12/) — October/November 2019 — 40 questions · 40 marks — Free
- [9702/13](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2019-october-november-9702-13/) — October/November 2019 — 40 questions · 40 marks — Free
- [9702/11](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2019-may-june-9702-11/) — May/June 2019 — 40 questions · 40 marks — Free
- [9702/12](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2019-may-june-9702-12/) — May/June 2019 — 40 questions · 40 marks — Free
- [9702/13](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2019-may-june-9702-13/) — May/June 2019 — 40 questions · 40 marks — Free

## Paper FAQ

**How are the difficulty and complexity measures calculated?**

Each part is weighted by its official marks. Difficulty uses Easy 0.20, Medium 0.45 and Hard 0.75; algebraic complexity and text density and modelling use Low 0.20, Medium 0.45 and High 0.75. A Hard part worth 4 or more marks is down-weighted to marks^0.75, so the accessible starter steps inside a long structured question do not inflate the difficulty result. This paper's Difficulty Measure is 0.35 from 40 parts.

**What does the Difficulty Deviation show?**

It is the mark-weighted standard deviation of the part difficulty values around the paper mean. A value of 0 would mean every tagged part has the same difficulty; this paper's deviation is 0.12, so its parts are more mixed than a single-level paper.

**Is the Difficulty Ratio based on question counts or marks?**

It is based on official marks, not question counts. This paper's shares are 40.0% Easy, 60.0% Medium and 0.0% Hard; the three shares sum to 100% before rounding.

**Are these official difficulty ratings?**

No. They are derived from the platform's part-level difficulty and static-question-profile tags. They are not exam-board grade boundaries and are not calculated from candidate outcomes. Use them to compare the demand profile of papers, not to predict a grade.

**Why does each question row show its own measures?**

Each row recalculates the same mark-weighted formula from that question's parts. A single-part MCQ therefore shows the tag value directly, while a multi-part structured question blends the tags of its parts using the same Hard-part decay as the paper profile.

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Full page with native tables, bar charts and Practice Hub links: https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-1/2019-march-9702-12/