IYPT 1999, Задачи на турнира — Задача 2. Ionic motor

12th IYPT (1999)

Заглавие в източника

Sources: Vlado Koutny: official text, Nov. 29, 1998, Prouza 12-22-1998, univie.ac.at 12.03.99 (HK), Školská fyzika, 2000, 1, 95—96
Selected at the Preparatory Seminar in Vienna on Nov. 29, 1998
Exemplary solutions for 1999 →

Условие

An electrolyte (an aqueous solution of CuSO4, NaCl, ...) in a shallow tray is made to rotate in the field of a permanent magnet (a small “pill” placed under the tray). An electric field is applied from a 1.5 V battery in such a way that one electrode is in the form of a conducting ring immersed in the electrolyte — the other is a tip of a wire placed vertically in the centre of the ring. Study the phenomenon and find possible relationships between the variables.

Original ionic motor diagram: ring and central electrodes, magnetic pill and battery labelled 4,5V.
The original diagram labels the battery 4,5 V; the problem text specifies 1.5 V. Both source values are retained.

Решение

Внимание: Непълно решение

В архива няма официално решение на тази задача.

Оригинал в Архива: 1999.txt · допълнителни данни: 1999-1.jpg · допълнителни данни: 1999-2.jpg · допълнителни данни: 1999-3-1.jpg · допълнителни данни: 1999-3-2.jpg