What is the easiest IB Physics EE topic to investigate?

There is no universally easiest topic, but mechanics, cooling, circuits, and acoustics often use accessible equipment and familiar theory. A simple apparatus is beneficial only if it produces precise, repeatable measurements. The investigation still needs analytical depth, such as model fitting, uncertainty analysis, and evaluation of assumptions. Confirming a textbook law with three measurements is unlikely to provide enough scope. Choose the simplest system that allows a genuinely thoughtful comparison between evidence and theory.

Does an IB Physics Extended Essay have to include an experiment?

A Physics EE can use primary experimental data, reliable secondary data, simulation, or a combination of these approaches. A secondary-data essay must still apply physics rather than summarize scientific articles. Public astronomy datasets are useful because they allow quantitative modelling when laboratory observations are impractical. A simulation should investigate a testable relationship and justify the model, assumptions, parameters, and validation method. Your supervisor should confirm that the proposed approach matches the guidance for your examination session.

How is a Physics EE different from the Physics scientific investigation?

The Physics EE is a DP core project of up to 4,000 words, while the scientific investigation is part of the Physics course assessment and has its own requirements. An EE normally develops a broader line of argument and uses more substantial background research. It can also examine a relationship beyond the taught syllabus, provided the physics remains understandable and accurately explained. The two projects must not reuse the same investigation or duplicate submitted work. Treat the EE as an independent research study rather than an expanded version of your scientific investigation.

How original must an IB Physics EE topic be?

The topic does not need to produce a discovery that is new to professional physics. Originality can come from your chosen variable range, apparatus, material, dataset, model comparison, or analytical approach. A familiar phenomenon can support a strong essay if the question is focused and your reasoning is independent. You must acknowledge methods, equations, data, and ideas taken from other sources. Avoid copying an exemplar's question because doing so weakens personal ownership and may create academic-integrity concerns.

Can an SL Physics student write a Physics EE?

Yes, an SL Physics student can undertake a Physics EE if the school can provide appropriate supervision. The essay is not restricted to HL students, but the question must support sustained physical analysis. Any theory beyond the student's course should be explained accurately and at a manageable level. A focused investigation using familiar mechanics or waves can be stronger than an overambitious modern-physics topic. Equipment access, mathematical preparation, and sustained interest matter more than choosing the most advanced-sounding subject.

Can I use AI when planning my Physics EE topic?

AI can help generate possibilities, compare scopes, or identify questions to discuss with your supervisor, subject to your school's rules. It must not replace your research, data analysis, reasoning, or writing. Verify every suggested equation, source, and factual claim because AI systems can invent references or overlook experimental limitations. Keep records of how tools were used and follow the IB academic-integrity guidance communicated by your school. Jojo AI is most useful for pressure-testing whether a proposed variable, method, and model form a coherent investigation, not for producing the essay itself.

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IB Physics EE Topics Worth Researching This Fall

IB Physics Extended Essay IB IB Extended Essay

• 29 Sept 2026•10

IB Physics EE Topics Worth Researching This Fall

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IB Physics EE Topics Worth Researching This Fall | RevisionDojo

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IB Physics EE Topics Worth Researching This Fall

IB Physics Extended Essay IB IB Extended Essay

• 29 Sept 2026•10

The strongest IB Physics EE topics are not necessarily the most advanced. They are focused questions that allow you to collect or obtain reliable data, apply a physical model, analyse uncertainty, and evaluate how well the evidence agrees with theory.

Promising areas include renewable energy, thermal physics, acoustics, electromagnetic damping, rotational mechanics, optics, and astronomy using public datasets. The ideas below are starting points, not titles to copy. Each must be adapted to your equipment, interests, safety requirements, and examination session.

What makes a Physics EE topic viable?

The Extended Essay is an independent research project with an upper limit of 4,000 words. A Physics EE must remain centred on physics, even when its context involves engineering, music, sport, or astronomy. Its purpose is to explain a physical relationship, not simply build an efficient device or describe how technology works.

A viable topic normally includes:

One clearly defined independent variable and one main dependent variable
A relevant law, equation, or model against which results can be tested
Equipment or secondary data you can access reliably
Measurements with meaningful uncertainties
Enough complexity for evaluation without requiring inaccessible theory

For students first assessed in May 2027, the revised EE criteria allocate 30 marks across framework, knowledge and understanding, analysis and line of argument, discussion and evaluation, and reflection. Confirm your examination session because older exemplars may use the previous model. The official IB Extended Essay update and Extended Essay subject brief explain the current framework.

IB Physics EE topics to scope this fall

Area	Provisional research angle	Feasible method	Main physics
Solar energy	How does panel temperature affect maximum electrical power at constant irradiance?	Small panel, temperature sensor, variable load, voltage and current measurements	Semiconductor behaviour, power, energy transfer
Passive cooling	How does surface finish affect the cooling constant of identical containers?	Temperature probes and repeated cooling curves	Radiation, convection, Newton's law of cooling
Acoustics	How does absorber thickness affect attenuation across a defined frequency range?	Speaker, microphone, fixed geometry, frequency sweep	Intensity, decibels, absorption
Electromagnetic damping	How does conductor thickness affect the damping constant of a magnetic pendulum?	Magnet pendulum, conducting plates, video tracking	Lenz's law, eddy currents, exponential decay
Rotational mechanics	How does radial mass distribution affect angular acceleration under constant torque?	Adjustable masses, pulley-driven torque, video analysis	Moment of inertia, torque
Fluid dynamics	How does tube radius affect viscous flow rate under constant pressure head?	Measured tubes, safe liquid, volume collection	Viscosity, pressure, laminar flow
Optical materials	How does temperature affect the refractive index of a transparent liquid?	Ray box, angle measurements, controlled water bath	Refraction, Snell's law
Astronomy	How accurately can a transit model estimate an exoplanet's radius ratio?	Archived light curve, curve fitting, residual analysis	Luminosity, transit depth, orbital geometry

Renewable energy and thermal physics

A strong solar investigation isolates one relationship, such as temperature against maximum power, rather than asking generally how to improve efficiency. Because outdoor irradiance fluctuates, conduct a pilot study to determine whether you can control or measure it adequately.

Cooling investigations become more analytical when you compare fitted cooling constants, test the limitations of an exponential model, and consider radiation and convection. Avoid asking which material is the best insulator. Define thickness, area, temperature range, and the quantity representing performance.

Waves, electromagnetism, and mechanics

Acoustic absorption is practical if your school has a quiet space, a consistent speaker, and a tested microphone. Investigate how thickness, density, or air-gap size changes attenuation at specified frequencies. Keep sound levels safe and account for reflections that may create systematic error.

Eddy-current damping offers accessible video analysis and a clear connection between electromagnetic induction and mechanical energy loss. You could model amplitude using

A(t)=A_0e^{-bt}

and compare the fitted damping coefficient $b$ as conductor thickness changes. The important discussion concerns whether the model fits the complete motion and what the residuals reveal.

Rotational mechanics is similarly useful because moment of inertia can change while total mass remains constant. Moving identical masses along a rotating arm lets you test $\tau=I\alpha$ , examine frictional torque, and evaluate the assumption that the masses behave as point particles.

Public-data astrophysics

A Physics EE does not require a school laboratory. NASA provides observations and tutorials through its Exoplanet Watch resources. A focused essay could fit a transit curve, estimate $R_p/R_s$ , inspect residuals, and compare the result with an accepted value.

Public data does not make an essay automatically sophisticated. Explain how the data were produced, justify their selection, apply a physical model, and evaluate uncertainty. The NASA Exoplanet Archive overview explains available data and analytical tools.

How to turn an idea into a research question

Start with a relationship, not a broad theme. “Solar energy” is an area, while “How does photovoltaic panel temperature affect maximum output power under constant irradiance?” identifies measurable quantities and a controlled context.

A useful drafting structure is:

How does [independent variable] affect [measured quantity] in [defined system], and to what extent do the results agree with [physical model]?

Before committing, complete a feasibility test:

Identify the equation or model you expect to apply.
Check that the independent variable can cover at least five sensible values.
Take repeated measurements at two trial values.
Estimate the dominant uncertainties.
Find credible sources explaining the relevant physics.
Decide what disagreement with the model could mean physically.

RevisionDojo's Physics EE guide and research-question guidance can help you test the scope before meeting your supervisor.

Common topic-selection mistakes

Choosing impressive theory without usable evidence often produces a descriptive essay. Topics such as quantum gravity or black-hole information theory usually depend on mathematics and literature beyond DP level.

Treating an engineering objective as the research question is another risk. “What blade design makes the best turbine?” prioritises optimization. A more physical question examines how blade pitch affects angular speed or power under specified conditions and explains the relationship through forces and energy transfer.

Other mistakes include changing several variables simultaneously, relying on an untested phone sensor, collecting too few data points, or using equipment that is available only once. Avoid hazardous radiation, high voltages, powerful lasers, damaging sound levels, or heavy apparatus without qualified supervision and formal school approval.

Use Physics EE exemplars to examine how scope, analysis, and evaluation influence quality, not to reproduce another student's question or method.

A practical fall scoping plan

During the first two weeks, shortlist three areas and complete preliminary reading. By week three, draft two possible questions for each area and discuss access, safety, and scope with your supervisor. During weeks four and five, run pilot trials and reject methods producing unstable, unmeasurable, or trivial results.

Keep dated notes explaining why your question or method changed. This supports meaningful reflection under the revised criteria. RevisionDojo's 2027 criteria guide and Researcher's Reflection Space guide explain how to document decisions rather than merely list tasks.

Conclusion

The best IB Physics EE topics combine accessible evidence with enough theoretical depth for modelling, uncertainty analysis, and evaluation. Solar cells, cooling, acoustics, eddy currents, rotational systems, fluid flow, optics, and exoplanet data are feasible when narrowed to one defensible relationship.

Use the fall to test equipment and data quality before finalising your question. RevisionDojo's Physics EE guide, exemplars, Jojo AI, and Coursework Review can help you check focus and criterion alignment while keeping the work genuinely your own.