VsOSh Problems and Solutions

The final stage of the Russian national olympiad, the last of four rounds that begin in individual schools. Around 300 students reach it. Archived here is the grade 11 theoretical round; a practical round is also sat.

2025

Russia

Problems5 problemsProblemsSolutions
  • 1Two stones from a tower*not published
  • 2Kelvin's four-process gas cycle*not published
  • 3Electrostatic levitation of dielectric disk*not published
  • 4Gluck's capacitor with droplet*not published
  • 5Two halves of a lens*not published

2024

Russia

Problems5 problemsProblemsSolutions
  • 1Charged bead on rubber band*not published
  • 2Mercury pancake between cylinders*not published
  • 3Charged truncated cone field*not published
  • 4Frame and wire velocity*not published
  • 5Inhomogeneous prism light paths*not published

2023

Russia

Problems5 problemsProblemsSolutions
  • 1Cassini gap diffraction pattern*not published
  • 2Charged ring and sphere field*not published
  • 3Rotating disk in magnetic field*not published
  • 4Adiabatic anisotropy of saturated steam*not published
  • 5Puck sliding on inclined board*not published

2022

Russia

Problems5 problemsProblemsSolutions
  • 1Two rubber bands on a puck*not published
  • 2Cylinder with valve and piston*not published
  • 3Charged bead on charged tube*not published
  • 4Solenoid and superconducting loop*not published
  • 5Nonlinear element and capacitor*not published

2021

Russia

Problems5 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published

2019

Russia

Problems5 problemsProblemsSolutions
  • 1Rolling cylinder with attached mass*not published
  • 2Melting under pressure: X and Y*not published
  • 3Diode capacitor circuit oscillations*not published
  • 4Magnetic cord near a wire*not published
  • 5Mermaid's view of moon path*not published

2018

Russia

Problems5 problemsProblemsSolutions
  • 1Spinning cylinder on inclined plane*not published
  • 2Recovering the second process curve*not published
  • 3Water planet satellite orbit*not published
  • 4Collisions in a magnetic field*not published
  • 5Dropped and thrown spheres in river*not published

2017

Russia

Problems5 problemsProblemsSolutions
  • 1Stone sliding on ice floe*not published
  • 2Two balls in U-tube*not published
  • 3Kelvin's isochoric phase diagram*not published
  • 4Diode bridge with capacitors*not published
  • 5Ohmmeter network readings*not published

2016

Russia

Problems5 problemsProblemsSolutions
  • 1Friction drive disk speed*not published
  • 2Circular process heat capacities*not published
  • 3Star AC circuit voltages*not published
  • 4MHD pump with suspended ball*not published
  • 5Solar sail distance*not published

2015

Russia

Problems5 problemsProblemsSolutions
  • 1Charged pendulum near charged hemisphere*not published
  • 2Conducting cube resistance*not published
  • 3Reactive tube with heater*not published
  • 4Distance to a moving radio source*not published
  • 5Milli-car with lens image*not published

2014

Russia

Problems5 problemsProblemsSolutions
  • 1Spring transverse and longitudinal oscillations*not published
  • 2Melting of tin nanofoil*not published
  • 3Kelvin's figure-eight cycle*not published
  • 4Charged pendulums under voltage*not published
  • 5Reconstructing lens from S0, S1, F*not published

2013

Russia

Problems5 problemsProblemsSolutions
  • 1Spoke rocking on a support*not published
  • 2Three squares with capacitor in magnetic field*not published
  • 3Lens reconstruction from triangle*not published
  • 4Soda bottle pressure*not published
  • 5Malfunctioning rocket Doppler*not published

2012

Russia

Problems5 problemsProblemsSolutions
  • 1Flour packet on spring scale*not published
  • 2Two rods on rails in magnetic field*not published
  • 3Dipole in a nonuniform electric field*not published
  • 4Linear process maximum work*not published
  • 5Lenses on a circle*not published

2011

Russia

Problems5 problemsProblemsSolutions
  • 1Trifilar pendulum period*not published
  • 2Charged particle in solenoid*not published
  • 3Stability of a piston*not published
  • 4Leaky capacitor with graded resistivity*not published
  • 5Flat light guide reflections*not published

2010

Russia

Problems5 problemsProblemsSolutions
  • 1Problem 1not published
  • 2Problem 2not published
  • 3Problem 3not published
  • 4Problem 4not published
  • 5Problem 5not published