The IB Physics Internal Assessment (IA) is a crucial part of the Diploma Programme, giving students a chance to explore physics concepts in depth through their own investigations. A strong IA not only boosts your grade but also deepens your understanding of physics and helps build essential research and analytical skills.
In this guide, we’ll explore 10 fresh IB Physics IA ideas for 2025, along with practical tips and how RevisionDojo can support your IA journey.
Why the IB Physics IA Matters
The Physics IA accounts for 20% of your final grade, making it a significant component of your overall success in the course. It tests your ability to:
- Design and conduct experiments
- Analyze data using appropriate mathematical tools
- Evaluate your methods and results critically
- Communicate your work clearly and effectively
Choosing the right topic is the first step to writing an outstanding IA.
Top 10 Fresh IB Physics IA Ideas for 2025
1️⃣ Friction on Inclined Planes
👉 Investigate how the coefficient of friction varies with surface material by changing the angle at which an object starts sliding. Use motion sensors or video analysis for precision.
2️⃣ Pendulum Length and Oscillation Period
👉 Explore the relationship between pendulum length and period, validating the formula T=2πL/gT = 2\pi \sqrt{L/g}T=2πL/g. Extend your study by examining effects of amplitude or air resistance.
3️⃣ Solar Panel Efficiency at Different Angles
👉 Measure the output of a solar panel at various tilt angles or distances from a light source. Identify the optimal angle for maximum energy output.
4️⃣ Drag Force on Different Shapes
👉 Use a fan or water flow to study how drag force changes with the shape or surface area of objects. Analyze the relationship between drag and velocity.
5️⃣ Thermal Conductivity of Metals
👉 Compare how quickly heat travels through rods of different metals. Use temperature sensors to measure heat flow and calculate conductivity.
6️⃣ Resistance of a Wire vs. Temperature
👉 Measure how the resistance of a metal wire changes with temperature. Apply the concepts of resistivity and temperature coefficient.
7️⃣ Buoyancy in Various Liquids
👉 Study how the buoyant force changes for an object in liquids of different densities. Relate your findings to Archimedes’ principle.
8️⃣ Measuring Refractive Index Using Snell’s Law
👉 Use lasers and protractors to calculate refractive indices of various liquids by measuring angles of incidence and refraction.
9️⃣ V-I Characteristics of Non-Ohmic Devices
👉 Investigate how the voltage-current relationship behaves for non-ohmic devices like diodes or filament bulbs.
🔟 Resonance in Air Columns
👉 Measure resonance frequencies of air columns of varying lengths to study standing waves and sound properties.
Tips for Choosing Your IA Topic
✅ Focus on continuous numerical variables to allow rich data analysis.
✅ Choose a manageable and feasible experiment that fits your school’s lab resources.
✅ Avoid overly ambitious or original topics that are hard to execute or analyze.
✅ Align your topic with IB Physics concepts for stronger connections to the syllabus.
How RevisionDojo Can Help You Succeed
RevisionDojo offers an all-in-one Physics IA toolkit designed to help you:
✨ Refine your research question
✨ Structure your IA according to IB criteria
✨ Analyze data with guided examples
✨ Avoid common pitfalls and improve clarity
👉 Whether you’re stuck choosing a topic or need help polishing your final draft, RevisionDojo provides reliable, student-friendly support that aligns with the 2025 IB Physics syllabus.
Final Thoughts
Choosing a clear, focused, and feasible topic is the first step toward a top-scoring Physics IA. Combine that with consistent effort, critical analysis, and support from tools like RevisionDojo, and you’ll be well on your way to success.
