# 9702/23 October/November 2017

> 9702/23 October/November 2017: 7 questions, 60 marks. Difficulty 0.35, deviation 0.12, algebraic 0.32, text density 0.27. CIE IAL Physics 9702 P2.

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CIE IAL · Physics · 2017 October/November

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=46108604-65e4-436e-aabf-8addb1b1cdfe)
- [All 9702 P2 papers](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-2/)

Core finding

**9702/23 October/November 2017 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 0.12 and a mark split of 38.3% Easy, 61.7% Medium and 0.0% Hard. Algebraic complexity averages 0.32; text density and modelling average 0.27. All five measures use 29 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 29 parts carrying 60 part marks. Difficulty tags cover 29 parts, algebraic tags 29 and text-density tags 29. 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**: 38.3 / 61.7 / 0.0 — % Easy / Medium / Hard
- **Algebraic Complexity Measure**: 0.32 — 0.20–0.75 · nearer Low
- **Text Density and Modelling Measure**: 0.27 — 0.20–0.75 · nearer Low

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** | 38.3% Easy / 61.7% Medium / 0.0% Hard | marks in band / all tagged marks |
| **Algebraic Complexity Measure** | 0.32 | Σ(c_i × marks_i) / Σmarks_i, with c = 0.20 / 0.45 / 0.75 |
| **Text Density and Modelling Measure** | 0.27 | 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 | [6.4 Power](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/) | 5 | 0.35 Medium | 0.20 Low | 0.30 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=46108604-65e4-436e-aabf-8addb1b1cdfe&question_id=878876bf-6f41-495b-a94c-af2b2ffa9526&source_detail=9702%2F23+October%2FNovember+2017) |
| **Q2** FRQ | [5.4 Density and pressure](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/density-and-pressure/) | 10 | 0.33 Medium | 0.33 Medium | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=46108604-65e4-436e-aabf-8addb1b1cdfe&question_id=c4f0a138-9f66-4265-b99a-18e087517f74&source_detail=9702%2F23+October%2FNovember+2017) |
| **Q3** FRQ | [4.3 Linear momentum and its conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/linear-momentum-and-its-conservation/) | 10 | 0.40 Medium | 0.40 Medium | 0.33 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=46108604-65e4-436e-aabf-8addb1b1cdfe&question_id=215deb0f-2503-4265-8b54-030c6661f01b&source_detail=9702%2F23+October%2FNovember+2017) |
| **Q4** FRQ | [14.2 Transverse and longitudinal waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/transverse-and-longitudinal-waves/) | 11 | 0.43 Medium | 0.43 Medium | 0.36 Medium | [Go to Practice Hub](https://www.examsci.com/practice?set_id=46108604-65e4-436e-aabf-8addb1b1cdfe&question_id=d4cb18b0-e123-4502-8d6e-e2e8e0944c4d&source_detail=9702%2F23+October%2FNovember+2017) |
| **Q5** FRQ | [17.1 Concept of an electric field](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/) | 10 | 0.35 Medium | 0.25 Low | 0.25 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=46108604-65e4-436e-aabf-8addb1b1cdfe&question_id=8bd737e9-22a9-4191-a671-8e7a8852c70c&source_detail=9702%2F23+October%2FNovember+2017) |
| **Q6** FRQ | [19.2 Potential difference and power](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/potential-difference-and-power/) | 10 | 0.28 Easy | 0.28 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=46108604-65e4-436e-aabf-8addb1b1cdfe&question_id=b5d61727-09d1-4ad5-b566-1f375a5bb9c0&source_detail=9702%2F23+October%2FNovember+2017) |
| **Q7** FRQ | [26.1 Atoms, nuclei and radiation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/atoms-nuclei-and-radiation/) | 4 | 0.33 Medium | 0.20 Low | 0.20 Low | [Go to Practice Hub](https://www.examsci.com/practice?set_id=46108604-65e4-436e-aabf-8addb1b1cdfe&question_id=5f6cc9ef-5c47-4cce-9a62-0dc77f61ee69&source_detail=9702%2F23+October%2FNovember+2017) |

## Topics in this paper

- [6.4 Power](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/)
- [1.2 SI units](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/si-units/)
- [5.4 Density and pressure](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/density-and-pressure/)
- [5.1 Types of force](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/)
- [6.1 Energy conversion and conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/)
- [2.1 Measurements](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/)
- [4.3 Linear momentum and its conservation](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/linear-momentum-and-its-conservation/)
- [1.4 Scalars and vectors](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/scalars-and-vectors/)
- [6.3 Potential energy and kinetic energy](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/)
- [14.2 Transverse and longitudinal waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/transverse-and-longitudinal-waves/)
- [14.3 Determination of frequency and wavelength of sound waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/)
- [14.1 Progressive waves](https://www.examsci.com/topics/cie-ial/physics/9702-paper-2/progressive-waves/)

## Related papers

- [9702/21](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-2/2017-october-november-9702-21/) — October/November 2017 — 8 questions · 60 marks — Free
- [9702/22](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-2/2017-october-november-9702-22/) — October/November 2017 — 7 questions · 60 marks — Free
- [9702/21](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-2/2017-may-june-9702-21/) — May/June 2017 — 7 questions · 60 marks — Free
- [9702/22](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-2/2017-may-june-9702-22/) — May/June 2017 — 8 questions · 60 marks — Free
- [9702/23](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-2/2017-may-june-9702-23/) — May/June 2017 — 7 questions · 60 marks — Free
- [9702/22](https://www.examsci.com/past-papers/cie-ial/physics/9702-paper-2/2017-march-9702-22/) — March 2017 — 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 29 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 38.3% Easy, 61.7% 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-2/2017-october-november-9702-23/