Съдържание

IOM 2021, Блиц — Задача 72

Оригинал на условието (PDF)Съобщи за грешка

Всички материали от IOM 2021

The Blitz-contest of IOM-2021

Условие

A very long uniform straight wire carrying constant electrical current $I$ is located at a distance $x$ from a thin rectangular frame (of metal) moving with constant speed $v$ towards the right side in a direction perpendicular to the wire, as shown in the figure. The width of the frame is $a$ , while its length is $b$ . Suppose $a$ is infinitely small compared to the distance between wire and frame. What is the emf induced in the frame?

A long vertical straight wire (drawn as two parallel lines) with an upward arrow for the current I; to its right a narrow vertical rectangular frame of width a (labelled at the top) and length b (labelled at its right side), moving to the right with velocity v (arrow); a dashed horizontal line from the wire to the lower end of the frame is labelled x.

$\frac{\mu_0 Iabv}{2\pi x^2}$
$\frac{\mu_0 Iaxv}{b^2}$
$\frac{\mu_0 Iabv}{x^2}$
$\frac{\mu_0 Iaxv}{2\pi b^2}$
$\frac{\mu_0 Iav}{2\pi x}$

Отговори

Решение

Оригинал в Архива: iom-2021-blitz-tasks-eng.pdf · официални решения: iom-2021-blitz-answers-eng.pdf