Physics Cup Problems
Jaan Kalda's competition, first run as a warm-up for IPhO 2012 and annual since 2017. One problem is released a month, and each week that passes without a solution publishes a further hint and lowers what the problem is worth.
All Mechanics Electromagnetism Thermodynamics Waves & Optics Modern & Quantum Relativity
Cards List
Kinematics Fluids Electrostatics Circuits Magnetostatics Entropy Kinetic theory Phase transitions Statistical mechanics Oscillations Diffraction Geometrical optics Quantum mechanics
Problems 5 problems
1 Added mass from polarizability* Problem 2 Cooling part of ice* Problem 3 Foci of bouncing ball arcs* Problem 4 Short-circuited resistor grid* Problem 5 Checkerboard grating diffraction pattern* Problem
Problems 5 problems
1 Infinite resistor lattice bounds* Problem 2 Catching missiles in accelerated ship* Problem 3 Inductance of loop on ferromagnetic cylinder* Problem 4 V-shaped vessel water oscillations* Problem 5 Mean free path of black sphere* Problem
Problems 4 problems
1 Charge and conducting disc force* Problem 2 Resistance of polygon network* Problem 3 Adiabatic magnetic cycle of electron gas* Problem 4 Lens from image of circle* Problem