Предмет: Физика, автор: zxMA647

По тонкому проволочному кольцу течет ток. Не изменяя силы тока в проводнике, ему придали форму квадрата. Во сколько раз изменилась напряженность магнитного поля в центре контура? Задачу сопроводить рисунком.

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Автор ответа: бодди

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