PHYSICS · HKDSE
PHYSICS/21
(Elective Curriculum)
Physics · 2023 · Variant 1
Relative difficulty
Analysis source: Hong Kong Examinations and Assessment Authority (HKEAA)
Analysis aligned to the official syllabus and assessment design.
3.8 / 5
153
210 min
Force and Motion
Cohort performance
Session statistics from official examination reports
Total marks
153
Duration
210 min
Session difficulty
3.8 / 5
Level 5**
~92% of max
Level 5*
~85% of max
Level 5
~74% of max
Key examiner messages
Top priorities from the principal examiner before you revise
The 2023 paper sits at a solid 3.8 out of 5 in difficulty. While mathematical operations in mechanics and waves were accessible, the paper set a high bar for descriptive questions. Candidates who relied on rote-memorized formulas struggled with unconventional scenarios, such as t
The 2023 paper sits at a solid 3.8 out of 5 in difficulty.
While mathematical operations in mechanics and waves were accessible, the paper set a high bar for descriptive questions.
Candidates who relied on rote-memorized formulas struggled with unconventional scenarios, such as the water rocket thermodynamic expansion in Q2 and the thermometer suitability in Q1.
Question difficulty map
How candidates performed on each question in this series
No data available in official reports
Assessment objectives
Skill and AO weighting from official examiner commentary
Skill weighting
Shows the skill mix this paper tested most heavily.
Mathematical
Weight: 6100%Qualitative Explanation
Weight: 583%Experimental
Weight: 350%Graphical
Weight: 233%Analysis
Weight: 117%
Method marks watchlist
Where working, steps, or method marks were commonly lost
No data available in official reports
Recurring mistakes across years
Themes examiners flag in multiple recent sessions for this subject
No data available in official reports
Question choice intelligence
Mean scores and popularity for optional questions (HKDSE electives)
No data available in official reports
Level exemplars
What candidate scripts at each grade level looked like
No data available in official reports
Grade & admission context
How marks relate to grade thresholds and entry standards
Reporting source
HKEAA Subject Examination Report — comments on candidates’ performance with marking schemes
Level 5**
Outstanding — competitive JUPAS programmes (medicine, law, top faculties)
Level 5*
Excellent — strong JUPAS profile for selective programmes
Level 5
Good — meets most university entrance requirements
Level 4
Satisfactory — foundation programmes or less selective routes
Level 3
Pass threshold for many sub-degree and vocational pathways
Admission context
Levels feed JUPAS and non-JUPAS university applications; 5** and 5* are most selective
Deep insights
What top candidates did
Techniques and approaches examiners rewarded in this series
No data available in official reports
Command word playbook
How to match each command word to the expected response style
Match the expected response style for “Find” questions.
Match the expected response style for “why” questions.
Match the expected response style for “State” questions.
Match the expected response style for “Mark” questions.
Time traps
Sections where candidates spent disproportionate time relative to marks
Min per mark: 1.7
Min per mark: 1.5
Syllabus traceability
Topics linked to questions and mark weighting in this session
Light: reflection, refraction, diffraction, lenses (Wave Motion)
14 marks this session
Electromagnetism & electromagnetic induction (Electricity and Magnetism)
13 marks this session
Circuits and Domestic Electricity (Electricity and Magnetism)
12 marks this session
MCQ trap analytics
Commonly chosen wrong options from examiner commentary
No data available in official reports
Topic heatmap across years
Mark concentration by topic and exam year for this subject
Mark intensity
Light: reflection, refraction, diffraction, lenses (Wave Motion)
Circuits and Domestic Electricity
Circuits and Domestic Electricity (Electricity and Magnetism)
Electromagnetism & electromagnetic induction (Electricity and Magnetism)
Nature and Properties of Waves
Electromagnetism & electromagnetic induction
Photoelectric effect (Atomic World Elective)
Light: reflection, refraction, diffraction, lenses
Paper comparison
Marks and duration breakdown across papers in this session
Paper 1 (Section A & B):
Paper 2 (Electives - Choose 2 out of 4):
Marks you can still earn
Where valid approaches outside the mark scheme may still gain credit
No data available in official reports
Practise what examiners flagged
Target weak topics from this report inside the Revui app
Light: reflection, refraction, diffraction, lenses (Wave Motion)
14 marks this session
Practise in RevuiElectromagnetism & electromagnetic induction (Electricity and Magnetism)
13 marks this session
Practise in RevuiCircuits and Domestic Electricity (Electricity and Magnetism)
12 marks this session
Practise in RevuiSelf-diagnostic checklist
Key actions before you sit this paper — copy and tick off as you revise
- 1Message
The 2023 paper sits at a solid 3.8 out of 5 in difficulty. While mathematical operations in mechanics and waves were accessible, the paper set a high bar for descriptive questions. Candidates who relied on rote-memorized formulas struggled with unconventional scenarios, such as t
- 2Message
The 2023 paper sits at a solid 3.8 out of 5 in difficulty.
- 3Message
While mathematical operations in mechanics and waves were accessible, the paper set a high bar for descriptive questions.
- 4Message
Candidates who relied on rote-memorized formulas struggled with unconventional scenarios, such as the water rocket thermodynamic expansion in Q2 and the thermometer suitability in Q1.
Teacher briefing pack
One-page session summary for tutors and classroom review
2023 2023
Physics
The 2023 paper sits at a solid 3.8 out of 5 in difficulty. While mathematical operations in mechanics and waves were accessible, the paper set a high bar for descriptive questions. Candidates who relied on rote-memorized formulas struggled with unconventional scenarios, such as t
The 2023 paper sits at a solid 3.8 out of 5 in difficulty. While mathematical operations in mechanics and waves were accessible, the paper set a high bar for descriptive questions. Candidates who relied on rote-memorized formulas struggled with unconventional scenarios, such as t
The 2023 paper sits at a solid 3.8 out of 5 in difficulty.
While mathematical operations in mechanics and waves were accessible, the paper set a high bar for descriptive questions.
- Total marks
- 153
- Duration
- 210 min
- Session difficulty
- 3.8 / 5
- Level 5**
- ~92% of max
- Level 5*
- ~85% of max
- Level 5
- ~74% of max
Session analysis
The 2023 paper sits at a solid 3.8 out of 5 in difficulty. While mathematical operations in mechanics and waves were accessible, the paper set a high bar for descriptive questions. Candidates who relied on rote-memorized formulas struggled with unconventional scenarios, such as the water rocket thermodynamic expansion in Q2 and the thermometer suitability in Q1.
Updated Jun 11, 2026
Paper breakdown
Paper 1 (Section A & B):
Paper 2 (Electives - Choose 2 out of 4):
Top chapters
Exam structure insights
Marks by chapter
See where the marks were concentrated so revision time goes to the highest-value topics.
Mark accessibility
Estimate which marks were basic, mid-level, or high-difficulty.
75% within easy or medium reach
Command word frequency
Spot common command words so answers match the expected response style.
Question type mix
Compare the mark share of each paper section and question type.
Conventional
(Structured)
104·11·68%
Multiple Choice
49·49·32%
Study ROI
Bigger bubbles recur more often; higher bubbles carry more marks, helping you rank revision priorities.
Difficulty trend
Compare difficulty across recent years.
Time vs marks
Compare marks with suggested time allocation to plan exam pacing.
Paper 1 Section A (
0.66 m/minPaper 2 (Electives)
0.60 m/minTotal marks
69
Total time
110 min
Avg pace
0.63
Cumulative marks ladder
The line is your running mark total question by question; dashed lines are the estimated grade cut-offs. See which question the line crosses your target grade at, so you know how far you must answer cleanly and which questions decide a band.
Next-year prediction
Topics worth watching next year, with the reason shown directly below each bar.
Electromagnetic Induction & AC Generator applications
88%88%
Photoelectric Effect Stopping Potential Graphs
82%82%
Difficulty Verdict & Key Observations
The 2023 paper sits at a solid 3.8 out of 5 in difficulty. While mathematical operations in mechanics and waves were accessible, the paper set a high bar for descriptive questions. Candidates who relied on rote-memorized formulas struggled with unconventional scenarios, such as the water rocket thermodynamic expansion in Q2 and the thermometer suitability in Q1.
Exam tips
Paper format
- Duration
- 1h
- Total marks
- 36
- Weighting
- 20%
- Question types
- MCQ, Structured Question
Analysis is paraphrased for study purposes. Always verify against the official examiner report and mark scheme.