IYPT 2015, Задачи на турнира — Задача 13. Magnetic Pendulum
Problems for the 28th IYPT 2015
Release
Released by the IOC on July 11th, 2014
Епиграф
“Would you tell me, please, which way I ought to walk from here?”
“That depends a good deal on where you want to get to,” said the Cat.
Lewis Carroll
Условие
Make a light pendulum with a small magnet at the free end. An adjacent electromagnet connected to an AC power source of a much higher frequency than the natural frequency of the pendulum can lead to undamped oscillations with various amplitudes. Study and explain the phenomenon.
Решение
Внимание: Непълно решение
Това е открита изследователска задача — официални решения не се публикуват.
Автори
Authors: Alan Allinson, John Balcombe, Roderick Bloem, Artsiom Bury, Samuel Byland, Nikita Chernikov, Lars Gislén, Łukasz Gładczuk, Timotheus Hell, Mihály Hömöstrei, Stanislav Krasulin, Valentin Lobyshev, Ilya Martchenko, Reza Montazeri Namin, Stanisław Świdwiński, Boris Vavrík, Evgeny Yunosov.
Problem selection committee: John Balcombe, Samuel Byland, Ilya Martchenko.
Epigraph selected by Evgeny Yunosov.
Оригинал в Архива: 2015.pdf