EuPhO Problems and Solutions

Files collected from EuPhO Website

Other resources: APhO, IPhO, NBPhO, RMPh, WoPhO

2026

Sweden

T1: Jumper

Problem Solution

T2: Hysteresis

Problem Solution

T3: Dry ice hockey

Problem Solution

E: Acoustic levitation

Problem Solution

2025

Bulgaria

T1: Sunny

Problem Solution

T2: Floating table

Problem Solution

T3: Crossed wires

Problem Solution

E1: Deep Learning

Problem Solution

E2: Hidden pattern

Problem Solution

2024

Georgia

T1: Sliding puck

Problem Solution

T2: Spaceships

Problem Solution

T3: Fabry–Pérot interferometer

Problem Solution

E: Physics of piezoelectricity

Problem Solution

2023

Germany

T1: Thermal lens

Problem Solution

T2: Brick between two planes

Problem Solution

T3: Plate between magnets

Problem Solution

E1: Magnetic Pendulum

Problem Solution

E2: Optical black-box

Problem Solution

2022

Slovenia

T1: Floating cylinder

Problem Solution

T2: Thermal oscillations

Problem Solution

T3: Dipole in a magnetic field

Problem Solution

E: Physics of illumination

Problem Solution

2021

Online

A leak

Problem Solution

Thread around a cylinder

Problem Solution

Glass ball

Problem Solution

2020

Online

Solenoid and loop

Problem Solution

Mechanical accelerator

Problem Solution

Cat eyes

Problem Solution

2019

Latvia

Ice pellets

Problem Solution

Motion of a charged ball

Problem Solution

Water hose

Problem Solution

2018

Russia

Three balls

Problem Solution

Solenoid

Problem Solution

Staircase

Problem Solution

2017

Estonia

Oscillating rope

Problem Solution

Disk in gas

Problem Solution

Superconducting mesh

Problem Solution