International Physics Olympiad
The most famous physics olympiad in existence. Recently, the problems have gotten very long but otherwise simple, meaning the most important thing is speed. Most of the files here have been compiled by Stefan Ivanov, who got them from the official IPhO website and the individual webpages. Some are from other sources such as the Austrian archive and personal connections. Take note of the errata list.
Also note that for very old papers (before 1999), the problems and solutions may come together. In those cases, I will label the pdf as the problem file. For example, if you see a file named Theory but there is no Theory Solutions, then either the solution is in the Theory file, or no solutions exist (but this is quite rare).
I am still working on adding the earlier years.
2025
T1: Hydrogen and galaxies
T2: Cox's Timepiece
T3: Champagne!
T4: Strongly correlated Fermi gases (Theory Backup)
E1: Earth's magnetic field measurement
E2: Sand craters and dunes
2024
T1: Greenhouse Effect
T2: Trapping Ions and Cooling Atoms
T3: Black Widow Pulsar
E1: Heat Conduction in a Copper Rod
E2: Diffraction from Phase Steps
2023
T1: Soil Colloids
T2: Neutron Stars
T3: Water and Objects
E1: Mass Measurement
E2: Birefringence
2022
T1: Permanent magnets
T2: James Webb Space Telescope
T3: Scaling laws
E1: Planet
E2: Cylindrical Diode
2021
T1: Planetary Physics
T2: Electrostatic Lens
T3: Particles and Waves
E1: Non-ideal Capacitors
E2: LEDs
2020
2019
T1: Zero-length springs and slinky coils
T2: Microwave Oven
T3: Thermoacoustic Engine
E1: Optical Measurements
E2: Wiedemann-Franz Law
2018
2017
Note: most of this year's problems have major issues.
Theory General InstructionsExperiment General InstructionsMinutes