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Q: What is the SPhO (Singapore Physics Olympiad)? A: The SPhO (Singapore Physics Olympiad) is Singapore's national physics olympiad for JC/IP students, run by the Institute of Physics Singapore (IPS). It has a 4-hour theory exam and a 4-hour practical exam on separate days. Schools nominate candidates - individual sign-up is not offered. Top performers are selected to represent Singapore at APhO and IPhO.
TL;DR\
SPhO rewards deep conceptual fluency in mechanics, E&M, and thermal/modern topics, plus disciplined practical skills.\
Use this as an orientation, but always follow the latest official IPS/SPhO circular for dates, format, and eligibility for your cohort.
Registration quick answer (Singapore): Schools nominate candidates to SPhO; individual sign‑up is not offered. Yearly circulars and dates are announced via official organisers - check NUS Physics’ SPhO page for current instructions: https://www.physics.nus.edu.sg/olympiad/spho
Registration & Access: School-nominated - your school must nominate you. Individual sign-up is not available. Ask your HOD Science or Physics teacher-in-charge if your school participates. See our access guide for workarounds.
1 What is SPhO?
Organiser: Institute of Physics, Singapore (IPS)
Format: 4-h Theory + 4-h Practical (on separate days)
Typical cadence: November sittings; awards/ceremony thereafter
Eligibility: JC/IP candidates via school nomination (confirm yearly details)
2 Why SPhO matters for IP students
Curriculum bridge: accelerates H2 mastery; primes H3 research modules
Portfolio signalling: nationally recognised achievement; pipeline to APhO/IPhO
Metacognition: planning experiments under time pressure mirrors A-Level Paper 3/4 skills
3 Paper structure and scoring
Theory: long structured problems; vector fluency, calculus in context
Worked example (outline): Internal resistance of a cell
Model: V = ε - Ir, with ε EMF and r internal resistance.
Plan: vary R_load, measure (I, V), keep temperature constant.
Plot: V vs I; best-fit line slope = -r, intercept = ε.
Uncertainty: use partial gradients Δr from extreme-fit lines; report r ± Δr with units.
Checks: power balance P_internal = I²r; verify with typical values.
Common practical pitfalls
Under-specifying control variables and safe ranges.
Disordered tables: mix of units, inconsistent significant figures.
Graphs without labelled axes/units or with poor scale choice.
DSA / Admissions Value
An SPhO medal is one of the strongest physics credentials a JC or IP student can hold. Schools offering scholarship programmes and universities considering early admissions often regard national olympiad results as evidence of advanced analytical ability. An SPhO distinction or medal can complement DSA-JC applications and strengthen university scholarship portfolios, particularly for STEM-related courses. Note that Eclat does not offer olympiad-specific tuition, but a solid foundation in H2 Physics underpins SPhO readiness. For broader context on how olympiad awards are evaluated in JC admissions and scholarship applications, see our Math Olympiad Awards and DSA guide.
For syllabus-aligned revision before attempting olympiad problems, start with our H2 Physics notes hub, then use the formulae and definitions pages as quick checks while working through past papers.
When to Start Preparing
Students targeting SPhO typically begin deepening their physics beyond the school syllabus from Secondary 4 or IP Year 4 onwards. Joining a school Olympiad CCA by Sec 2-3 helps build early familiarity with contest-style notation and multi-step reasoning. A realistic preparation runway is 6-12 months before the November sitting, with the first half focused on concept consolidation and the second half on timed practice and practical skills. Building strong IP Physics fundamentals or A-Level Physics mastery provides the base for olympiad-level extension. See the full physics olympiad pathway for how SPhO fits into the broader SJPO → SPhO → APhO → IPhO pipeline, and the competition calendar for key dates.
7 Bridges and next steps
SJPO → SPhO → APhO/IPhO pathway overview
Decide between extended Olympiad track vs syllabus-first focus
Note: IPS releases yearly details on format and eligibility via schools. Treat examples above as orientation; your school circular is authoritative for your cohort.
International Physics Olympiad archive:IPhO problems archive has past IPhO papers, which are the gold standard for SPhO-level preparation
Asian Physics Olympiad papers: APhO past papers provide intermediate difficulty between SPhO and IPhO
Recommended textbooks: Morin's Introduction to Classical Mechanics for mechanics; Griffiths' Introduction to Electrodynamics for E&M
Frequently Asked Questions about SPhO 2026
What is the SPhO (Singapore Physics Olympiad)?
The SPhO (Singapore Physics Olympiad) is Singapore's national physics olympiad for pre-university students, organised by the Institute of Physics, Singapore (IPS). Top SPhO performers are selected for Singapore's team at the Asian Physics Olympiad (APhO) and International Physics Olympiad (IPhO).
What does SPhO stand for?
SPhO stands for Singapore Physics Olympiad.
When is SPhO 2026?
SPhO is typically held in November each year. Dates are announced by IPS via school circulars. Check physics.nus.edu.sg/olympiad/spho and your school's physics department for the confirmed 2026 schedule.
How do I register for SPhO?
SPhO registration is through school nomination only - individual or private sign-up is not available. Your school's physics teacher nominates eligible candidates and submits entries to IPS. Confirm the nomination process and deadline with your teacher-in-charge.
What is the SPhO format?
SPhO has two papers on separate days:
Theory paper: 4 hours - multi-topic structured problems on mechanics, E&M, thermodynamics, modern physics
Both emphasise physical reasoning, clear assumptions, correct units, and significant figures.
Who is eligible for SPhO?
SPhO is for JC and IP students who are nominated by their schools. Confirm the current eligibility details (year level, nomination criteria) with IPS or your school's physics department via the yearly circular.
What are the SPhO medal bands?
Medal bands and award thresholds are published by IPS after each competition cycle. Confirm the current year's award structure via your school circular or ipssingapore.org.
What topics does SPhO test?
SPhO covers the full pre-university physics curriculum and beyond:
SPhO → APhO (Asian Physics Olympiad) → IPhO (International Physics Olympiad) is the Singapore pathway. Strong SPhO performers are selected and trained for APhO; APhO experience feeds into IPhO selection. SJPO (Singapore Junior Physics Olympiad, for Sec 2–3) is the earlier entry point to this pipeline. See the full physics olympiad pathway for details.
Does an SPhO medal help with DSA or university admissions?
An SPhO medal is one of the strongest physics credentials for JC scholarship applications and university early admissions, particularly for STEM courses. Schools and universities regard national olympiad results as evidence of advanced analytical ability. Confirm specific DSA or scholarship criteria with your target institution.
How do I prepare for SPhO?
Deepen H2 Physics mastery - especially mechanics, E&M, and thermodynamics at derivation level
Work through past SPhO theory problems - multi-step structured questions requiring physical reasoning
Study IPhO problems - the best students use past IPhO theory papers as SPhO stretch practice
Follow the timeline: concept consolidation (Jun–Jul), mixed papers under time (Aug–Sep), full dress simulations (Oct), taper (Nov)
Can my child prepare for SPhO without tuition?
Self-study is possible with the right textbooks. Young & Freedman (University Physics) covers the theory at the required depth, and Irodov (Problems in General Physics) provides competition-grade practice problems. Supplementing with past SPhO and IPhO theory papers builds exam-readiness. Many SPhO medalists prepare through school physics Olympiad CCAs rather than external tuition. See our competition prep resources guide for free materials and book recommendations.
9 Worked examples (with solutions)
9.1 Induction and energy consistency (classic “loop entering B-field”)
Problem. A conducting rectangular loop of width w and total resistance R is pulled at constant speed v into a region of uniform magnetic field B pointing into the page. The field edge is sharp and vertical. When a length x of the loop is inside the field, find (i) the induced emf, (ii) current, and (iii) the pulling force F required to keep speed constant. Show that the mechanical power input equals the electrical power dissipated.
Solution. Flux Φ = B·(w·x). The flux changes because x increases at rate v.
Faraday: emf magnitude ε = |dΦ/dt| = B w v. Direction by Lenz: current opposes entry.
Ohm's law: I = ε / R = (B w v)/R.
Magnetic force on the “leading” segment (length w) in field: F = I w B = (B w v / R)·w·B = B² w² v / R, opposing motion. To keep v constant, the applied pull must match this magnitude.
Power balance. Mechanical input P_mech = F v = (B² w² v / R)·v = B² w² v² / R. Electrical dissipation P_elec = I² R = (B² w² v²)/R. Hence P_mech = P_elec as expected (energy conservation). ∎
Exam habits. Draw a clear diagram, mark the “active” segment in field, and state Lenz's direction verbally to avoid sign confusion.
9.2 Mechanics - two-block system with friction
Problem. A block (mass m) rests on a rough horizontal table (coefficient of kinetic friction μ) and is connected by a light, inextensible string over a smooth pulley at the table's edge to a hanging mass M. The system is released from rest and moves with acceleration a. Find a and the string tension T, assuming motion occurs and friction is kinetic.
Solution. Take rightward motion of m and downward motion of M as positive. For block m: friction f_k = μ m g opposes motion (leftward). Newton's second law:
Table block: T - μ m g = m a. Hanging block: M g - T = M a. Add equations: (T - μ m g) + (M g - T) = (m + M) a ⇒ a = (M g - μ m g)/(m + M).
Back-substitute to get T, e.g. from table block: T = m a + μ m g = m (M g - μ m g)/(m + M) + μ m g = (m M g + μ m² g + μ m g (m + M) - μ m² g)/(m + M) simplifies to T = (m M g + μ m M g)/(m + M) = m M g (1 + μ)/(m + M).
Sanity checks. • If μ = 0, a = M g/(m + M) (frictionless Atwood variant). • If M ≪ μ m, acceleration tends to negative (no motion); consistent with the “assuming motion” clause-use inequality M > μ m to ensure sliding.
