# 9702/22 March 2020

> 9702/22 March 2020: 7 questions, 60 marks. Difficulty 0.35, deviation 0.13, algebraic 0.27, text density 0.40. CIE IAL Physics 9702 P2.

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CIE IAL · Physics · 2020 March

This Physics 9702 Paper 2 (AS Structured) paper contains 7 questions worth 60 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 P2
- 7 questions
- 60 marks
- Free paper
- [Practise this paper](https://www.examsci.com/practice?set_id=24060eaf-b8ef-4a7b-b0fc-ed3487ccc917)
- [All 9702 P2 papers](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-2/)

Core finding

**9702/22 March 2020 is a past paper for CIE IAL Physics 9702 Paper 2 (AS Structured), with 7 questions worth 60 marks.** Its mark-weighted Difficulty Measure is 0.35 on a 0.20–0.75 scale, with a Difficulty Deviation of 0.13 and a mark split of 41.7% Easy, 56.6% Medium and 1.7% Hard. Algebraic complexity averages 0.27; text density and modelling average 0.40. All five measures use 35 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 35 parts carrying 60 part marks. Difficulty tags cover 35 parts, algebraic tags 35 and text-density tags 35. Tags are internal metadata, not official exam-board ratings.

- **Difficulty Measure**: 0.35 — 0.20–0.75 · nearer Medium
- **Difficulty Deviation**: 0.13 — 0 = uniform; higher = more mixed
- **Difficulty Ratio**: 41.7 / 56.6 / 1.7 — % Easy / Medium / Hard
- **Algebraic Complexity Measure**: 0.27 — 0.20–0.75 · nearer Low
- **Text Density and Modelling Measure**: 0.40 — 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** | 0.13 | √(Σw_i(d_i − μ)^2 / Σw_i) |
| **Difficulty Ratio** | 41.7% Easy / 56.6% Medium / 1.7% Hard | marks in band / all tagged marks |
| **Algebraic Complexity Measure** | 0.27 | Σ(c_i × marks_i) / Σmarks_i, with c = 0.20 / 0.45 / 0.75 |
| **Text Density and Modelling Measure** | 0.40 | 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-2/si-units/) | 6 | 0.28 Easy | 0.20 Low | 0.37 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=24060eaf-b8ef-4a7b-b0fc-ed3487ccc917&question_id=1e4bd22a-a895-4b67-81c2-2a68a05fb6d2&source_detail=9702%2F22+March+2020) |
| **Q2** FRQ | [14.4 Doppler effect](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/) | 9 | 0.34 Medium | 0.26 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=24060eaf-b8ef-4a7b-b0fc-ed3487ccc917&question_id=4927c8f5-4d08-4250-8296-eaedee979cb5&source_detail=9702%2F22+March+2020) |
| **Q3** FRQ | [6.2 Work and efficiency](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/) | 12 | 0.43 Medium | 0.43 Medium | 0.43 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=24060eaf-b8ef-4a7b-b0fc-ed3487ccc917&question_id=8c414acb-55de-4f64-881f-360a56ad8af3&source_detail=9702%2F22+March+2020) |
| **Q4** FRQ | [14.1 Progressive waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/progressive-waves/) | 9 | 0.34 Medium | 0.28 Low | 0.34 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=24060eaf-b8ef-4a7b-b0fc-ed3487ccc917&question_id=bb80ffe5-d227-40c8-b355-6924a6e3d12a&source_detail=9702%2F22+March+2020) |
| **Q5** FRQ | [19.3 Resistance and resistivity](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/resistance-and-resistivity/) | 12 | 0.33 Medium | 0.20 Low | 0.43 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=24060eaf-b8ef-4a7b-b0fc-ed3487ccc917&question_id=d575dea4-8461-4560-a68b-de7d8d3c728b&source_detail=9702%2F22+March+2020) |
| **Q6** FRQ | [17.2 Uniform electric fields](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/) | 7 | 0.31 Easy | 0.20 Low | 0.45 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=24060eaf-b8ef-4a7b-b0fc-ed3487ccc917&question_id=4c9aa3aa-a5e7-4867-9270-d916952521d7&source_detail=9702%2F22+March+2020) |
| **Q7** FRQ | [26.2 Fundamental particles](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/fundamental-particles/) | 5 | 0.40 Medium | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=24060eaf-b8ef-4a7b-b0fc-ed3487ccc917&question_id=b8bfbeff-f621-42a8-88e3-cd461f544c39&source_detail=9702%2F22+March+2020) |

## Topics in this paper

- [1.2 SI units](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/si-units/)
- [3.1 Equations of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/equations-of-motion/)
- [2.2 Errors and uncertainties](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/errors-and-uncertainties/)
- [14.4 Doppler effect](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/)
- [6.3 Potential energy and kinetic energy](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/)
- [4.1 Momentum and Newton’s laws of motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/momentum-and-newton-s-laws-of-motion/)
- [4.2 Non-uniform motion](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/non-uniform-motion/)
- [6.2 Work and efficiency](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/)
- [1.4 Scalars and vectors](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/scalars-and-vectors/)
- [5.3 Equilibrium of forces](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/equilibrium-of-forces/)
- [5.4 Density and pressure](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/density-and-pressure/)
- [9.1 Stress and strain](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/stress-and-strain/)

## Related papers

- [9702/21](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-2/2020-october-november-9702-21/) — October/November 2020 — 8 questions · 60 marks — Free
- [9702/22](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-2/2020-october-november-9702-22/) — October/November 2020 — 7 questions · 60 marks — Free
- [9702/23](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-2/2020-october-november-9702-23/) — October/November 2020 — 7 questions · 60 marks — Free
- [9702/21](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-2/2020-may-june-9702-21/) — May/June 2020 — 6 questions · 60 marks — Free
- [9702/22](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-2/2020-may-june-9702-22/) — May/June 2020 — 7 questions · 60 marks — Free
- [9702/23](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-2/2020-may-june-9702-23/) — May/June 2020 — 7 questions · 60 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 35 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 0.13, 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 41.7% Easy, 56.7% Medium and 1.7% 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-2/2020-march-9702-22/