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Консультация № 189584
15.06.2016, 23:26
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Уважаемые эксперты! Пожалуйста, ответьте на вопрос:
Электрический ток I = 3 А протекает по тонкому проводнику, изогнутому в форме дуги окружности радиуса R = 4 см. Длина дуги составляет 1/7 от длины окружности. Подводящие провода расположены радиально. Определите величину напряженности магнитного поля в центре кривизны дуги окружности, используя закон Био-Савара-Лапласа. Результат запишите с точностью до десятых.
Электрический ток I = 3 А протекает по тонкому проводнику, изогнутому в форме дуги окружности радиуса R = 4 см. Длина дуги составляет 1/7 от длины окружности. Подводящие провода расположены радиально. Определите величину напряженности магнитного поля в центре кривизны дуги окружности, используя закон Био-Савара-Лапласа. Результат запишите с точностью до десятых.
Обсуждение
18.06.2016, 07:32
общий
это ответ
Здравствуйте, sanbkooo1!
Подводящие провода расположены радиально и поэтому не создают магнитного поля в заданной точке. Напряжённость магнитного поля, создаваемого дугой окружности, можно найти из выражения для напряжённости поля в центре кругового проводника с током, учитывая равный вклад каждой из семи частей такого проводника. Получим
что после подстановки числовых значений даёт
(А/м).
Направление псевдовектора напряжённости магнитного поля определяется по мнемоническому правилу правого буравчика.
Подводящие провода расположены радиально и поэтому не создают магнитного поля в заданной точке. Напряжённость магнитного поля, создаваемого дугой окружности, можно найти из выражения для напряжённости поля в центре кругового проводника с током, учитывая равный вклад каждой из семи частей такого проводника. Получим
что после подстановки числовых значений даёт
(А/м).Направление псевдовектора напряжённости магнитного поля определяется по мнемоническому правилу правого буравчика.
Об авторе:
Facta loquuntur.
Facta loquuntur.
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