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TL;DR H2 Physics covers more topics, has a practical exam (Paper 4), and is required by most engineering and physical-science university courses. H1 Physics covers roughly half the H2 syllabus, has no practical paper, and counts as one content subject (half-weight) in the University Admission Score (UAS). Choose H2 if your target course lists it as a prerequisite or preferred subject. Choose H1 if you need a science complement but your main strengths and university goals lie elsewhere. The decision is made during JC subject combination selection — typically at the start of JC1. Switching from H1 to H2 mid-year is very difficult.
Why this decision matters
Your choice between H2 and H1 Physics affects three things directly:
University course eligibility — many engineering, computing, and physical-science programmes require or strongly prefer H2 Physics
Daily workload — H2 Physics has roughly twice the content and includes a practical examination
Most JC students make this decision during subject combination selection at the start of JC1. Schools generally allow students to drop from H2 to H1 during JC1, but upgrading from H1 to H2 after classes have begun is rarely permitted because of the content gap.
Syllabus scope comparison
H1 Physics covers a subset of the H2 syllabus. The table below shows the major topic areas and which level includes them.
Yes (partial: current electricity and d.c. circuits only)
Modern Physics (quantum physics, nuclear physics)
Yes
Yes (partial: nuclear physics only)
Circular Motion and Gravitation
Yes
No
H2 Physics covers approximately 18–20 content topics across these areas. H1 Physics covers approximately 8–10 topics — roughly half the H2 syllabus.
The full syllabus documents are published by SEAB: SEAB A-Level examinations. Check the current year's syllabus for exact topic listings.
Exam format comparison
Feature
H2 Physics (9478)
H1 Physics (8867)
Paper 1 (MCQ)
1 h, 30 MCQs, 30 marks
1 h, 30 MCQs, 30 marks
Paper 2 (Structured)
2 h, 75 marks
2 h, 80 marks
Paper 3 (Long-form)
2 h, 75 marks
Not applicable
Paper 4 (Practical)
2 h 30 min, 50 marks
Not applicable
Total papers
4
2
Practical component
Yes (Paper 4)
No
Total exam time
~7 h 30 min
~3 h
The practical paper (Paper 4) is a distinguishing feature of H2 Physics. It tests planning, execution, and analysis of experiments in a laboratory setting. H1 Physics has no practical examination.
Usually yes (Physics is not the binding constraint)
Life Sciences, Biological Sciences
H2 Chemistry or Biology typically required; Physics less critical
Usually yes
Business, Accountancy, Law, Arts
No specific science requirement in most cases
Not applicable
Programme-level prerequisite examples
The table below gives specific programme examples to illustrate how the requirement plays out in practice.
Programme
University
H2 Physics required?
H1 Physics sufficient?
Engineering (all branches)
NUS, NTU
Yes
No
Computer Science
NUS
No (H2 Mathematics required)
Yes
Computer Science
NTU
Varies by track
Check the specific track
Data Science and Analytics / Data Science
NUS, NTU, SMU
No (H2 Mathematics usually required)
Yes
Medicine / Dentistry
NUS, NTU
No (H2 Chemistry required; Physics is not the binding constraint)
Usually yes
Architecture
NUS
No
Yes
Physics / Applied Physics
NUS, NTU
Yes
No
Business, Accountancy, Law
NUS, NTU, SMU
No science requirement in most cases
Not applicable
This table is indicative only. Prerequisites change by intake year and by programme variant (e.g. double-degree or direct-honours tracks may differ). Always verify against the university's published admission requirements for your specific intake year.
Check the source directly. University admissions requirements are published on:
Requirements change by intake year. Do not rely on secondhand summaries.
Workload comparison
Dimension
H2 Physics
H1 Physics
Weekly lecture/tutorial hours
Typically 4–5 h
Typically 2–3 h
Practical sessions
Regular lab sessions (assessed)
No lab sessions
Content volume
~18–20 topics
~8–10 topics
Problem-solving depth
Multi-step, cross-topic questions common
Typically single-concept or two-concept questions
Revision load for A-Levels
Significant — 4 papers to prepare for
Moderate — 2 papers
Students taking H2 Physics should expect to spend roughly twice the study time on Physics compared to H1. This time comes from somewhere — usually from the subjects that are not H2.
Who should take H2 Physics
H2 Physics is the stronger choice if:
Your target university course requires H2 Physics (e.g. engineering, physical sciences)
You scored well in O-Level Pure Physics (A1–B3) and enjoy the problem-solving style
You are comfortable with a mathematically demanding subject — H2 Physics uses calculus and algebraic manipulation extensively
You want maximum flexibility for STEM university applications
You are prepared for the practical examination component
Who should take H1 Physics
H1 Physics is the better choice if:
Your university goals do not require H2 Physics (e.g. business, arts, social sciences, or life sciences where Biology or Chemistry is the binding subject)
You want science literacy without committing to a full H2 workload
Your subject combination already includes three demanding H2 subjects and adding H2 Physics would spread you too thin
You prefer to allocate study time to subjects that contribute more directly to your university application
H1 Physics is not a "weaker" version of Physics — it is structurally designed for students whose primary academic focus lies in other disciplines.
The H1 difficulty paradox
A common misconception is that H1 Physics is simply "easier H2." While H1 covers fewer topics and has no practical exam, the exam questions are not necessarily simpler — they test the same conceptual rigour within the narrower H1 syllabus scope.
Students who choose H1 expecting an easy pass sometimes find the questions more demanding than anticipated. Because the H1 paper must still differentiate between grades across a compressed topic set, examiners can probe core concepts with greater depth than a broad H2 paper that must cover many topics within the same time limit. You get fewer topics but not necessarily easier thinking.
Discussions on r/SGExams, KiasuParents, and SGForums capture this asymmetry well: perceived difficulty and actual grade outcome can diverge. A student may find Physics harder conceptually than Biology yet consistently score better in Physics — because Physics problem-solving is more structurally predictable. Once you internalise the framework for a question type, the same approach applies across many exam questions. Biology, by contrast, requires broader factual recall and essay technique that is harder to systematise.
The practical implication: do not choose H1 Physics purely to reduce exam difficulty. Choose H1 because of workload management and university pathway fit — the reasons described above. The exam itself still demands rigorous preparation.
UAS (University Admission Score) impact
Under the current UAS framework (applicable from AY2026 admissions):
H2 subjects contribute their full grade to the UAS
H1 content subjects contribute at half weight
The best three H2 and one H1 content subject are counted (plus GP and PW requirements)
Taking H1 Physics means Physics contributes at half weight. If Physics is your strongest science, this may cost UAS points compared to taking it at H2.
Use this simplified framework during subject combination selection:
Check university prerequisites first. If your target course requires H2 Physics, the decision is made for you.
If no hard prerequisite exists, assess whether Physics is likely to be one of your top-scoring subjects. If yes, taking it at H2 maximises its UAS contribution.
If Physics is a supporting subject (not your strongest, and not required), H1 lets you maintain science breadth without overloading your timetable.
Consider your three H2 subjects as a set. Most JC students take three H2 subjects and one H1 content subject. The question is whether Physics is strong enough to be one of your three H2s.
This is very difficult in practice. H2 Physics moves faster and covers topics (e.g. thermal physics, gravitation, electromagnetic induction) not taught in H1. Most schools do not permit this switch after the first few weeks. If you think you might want H2, start with H2 — dropping to H1 later is much easier than upgrading.
Is H1 Physics easier than H2 Physics?
H1 covers fewer topics and has no practical exam, so the total workload is lower. But the exam questions are not necessarily "easier" — they test the same conceptual rigour within the H1 syllabus scope. See the H1 difficulty paradox section above for a fuller discussion.
Why do some students score better in Physics than Biology even though Physics feels harder?
Physics has a more predictable problem-solving structure. Once you master the approach for a given question type, the same analytical framework applies across many exam questions. Biology requires broader factual recall and essay-writing skills that are harder to systematise — the "feels harder" perception in Physics does not map cleanly onto actual grade outcomes. This is relevant when choosing between H1 Physics and H1 Biology as your fourth subject: "harder to understand" and "harder to score well in" are different things.
Do universities look down on H1 Physics?
No. Universities assess applicants based on whether prerequisite subjects are met and overall UAS. H1 Physics is a legitimate A-Level subject. However, it does not satisfy prerequisites that specify H2 Physics.
I want to study Computer Science. Do I need H2 Physics?
It depends on the university. NUS Computing, for example, requires H2 Mathematics but does not mandate H2 Physics. NTU's Computer Science programme has its own prerequisites. Check each programme's published requirements directly.
Can I take both H2 Physics and H2 Chemistry?
Yes — this is one of the most common JC science combinations (PCM: Physics, Chemistry, Maths at H2). It is a heavy workload but keeps maximum university options open for STEM courses.
