IOM 2017, Блиц — Задача 40

OLYMPIAD OF METROPOLISES. Moscow, September 4 · 4 септември 2017 г.

Условие

A metal ring of a radius of 0.1 m is lying still on a table. The electrical resistance of the ring is 1.57 Ohm. Find the electric charge (in microcoulombs) which would flow in the ring if we quickly turn it around, so that it ends up lying on its opposite side. The vertical component of the Earth’s magnetic field is $5 \cdot 10^{-5}$ T.

The answer should be given in the SI units unless otherwise stated. If the numerical result turns out to be an integer, it should be given as the answer. Otherwise round the result to the first decimal.
$g = 10\ \mathrm{m/s^2}$.

Отговори

Решение

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Оригинал в Архива: blitz.pdf · официални решения: answers-blitz.pdf