A Physics IA starts the same way for most IB students: a blank page, a half-remembered experiment from class, and a quiet fear that your “good idea” is actually too big, too vague, or too common.
The trick is simpler than it feels. A strong IB Physics IA is usually a small, measurable question with room for real analysis: uncertainties, graphs, and a conclusion that earns its confidence.
A quick checklist for a high-scoring IB Physics IA
Before you choose from the ideas below, make sure your IB IA topic passes these five filters:
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One clear independent variable you can change in steps
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One clear dependent variable you can measure repeatedly
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Controls you can actually keep constant (or justify)
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Enough data for meaningful processing (not just one perfect run)
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Analysis headroom: uncertainty, linearization, model comparison
For rubric-specific guidance, keep the IB Physics Internal Assessment Guide open while you plan.
Best IB Physics IA ideas for 2024 (easy, moderate, hard)
Below are reliable IB Physics IA ideas that can be adapted into unique research questions. Each one is designed to be feasible in a school lab (or at home, safely), while still giving you space to think.
Easy IB Physics IA ideas (simple setup, strong fundamentals)
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Projectile motion of a thrown ball (Mechanics)
Use video analysis to compare measured range/time-of-flight with kinematics. Connect to Kinematics notes for clean modeling. -
Voltage vs current in a resistor (Electricity)
Build a V-I graph, test Ohm’s law, and discuss non-ohmic behavior if you warm the resistor. Pair with Current and circuits notes. -
Refraction through different media (Optics)
Measure angles, test Snell’s law, and compare refractive indices with uncertainties. -
Pressure vs volume in gases (Gas laws)
A classic that can still work if you add strong uncertainty treatment and a thoughtful evaluation.
Moderate IB Physics IA ideas (more control, better analysis)
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Inclined plane angle vs acceleration (Mechanics)
Great for modeling frictional effects and comparing theory to measured motion. -
Springs in series vs parallel (Mechanics)
Determine effective spring constants and evaluate energy losses. Use good graphing and error bars. -
Cooling rate of different liquids (Thermal physics)
Newton’s law of cooling gives you a model to test, refine, and critique. -
Speed of sound using resonance (Waves)
Use resonance tubes or bottles; compare to accepted values and explain deviations.
Hard IB Physics IA ideas (high ceiling, higher risk)
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Damping in oscillating systems (Oscillations)
Estimate damping constants, compare models, and justify assumptions. -
Terminal velocity and drag factors (Mechanics/fluids)
Excellent analysis potential, but you must control measurement quality. -
Photoelectric effect vs light intensity (Quantum)
Powerful conceptually, but feasibility depends on equipment and calibration.
How to make your IB Physics IA idea feel original
Many IB students worry their idea is “too common.” Examiners usually care less about novelty and more about thinking.
Try one of these upgrades:
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Add a second condition (two materials, two temperatures, two geometries)
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Compare two models (simple vs more realistic)
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Make uncertainty central using Uncertainties and errors practice
If you want to see what real high-quality coursework looks like, browse Physics IA examples or the broader IB Physics exemplars collection.
Where RevisionDojo fits into your IB Physics IA workflow
A calm IA process is usually a tool-driven process. RevisionDojo helps IB students move faster without guessing:
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Use the Questionbank to sharpen your physics fundamentals (so your rationale and evaluation sound like you).
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Use IB Physics resources and IB Physics notes to reconnect your idea to syllabus language.
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Use AI Chat and Grading tools to stress-test your method and conclusion wording.
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Use Flashcards and Study Notes when your IA overlaps with exam prep.
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Use Mock Exams, Predicted Papers, and Tutors when you need momentum across the whole IB season.
For deeper IA scoring strategy, read IB Physics IA rubric explained.
Final thought: pick the IB Physics IA idea you can finish
The best IB Physics IA ideas for 2024 are the ones you can execute cleanly, analyze honestly, and explain with confidence. Choose a topic that fits your time, your equipment, and your curiosity, then make it specific.
When you’re ready, use RevisionDojo to move from idea to execution: Study Notes for the theory, Questionbank for confidence, Coursework Library exemplars for structure, and AI Chat plus Grading tools to polish the final submission. Your IA doesn’t need to be flashy. It needs to be finished, focused, and undeniably IB.