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Консультация № 195852
15.06.2019, 22:05
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Здравствуйте! Прошу помощи в следующем вопросе:
Прямой проводник длиной l = 25 см заряжен с линейной плотностью τ = 0,6•10-6 Кл/м. Определить напряжённость поля в точке, находящейся на перпендикуляре, восстановленному к середине проводника, на расстоянии 10 см от него.
Прямой проводник длиной l = 25 см заряжен с линейной плотностью τ = 0,6•10-6 Кл/м. Определить напряжённость поля в точке, находящейся на перпендикуляре, восстановленному к середине проводника, на расстоянии 10 см от него.
Обсуждение
18.06.2019, 10:35
общий
это ответ
Здравствуйте, dar777!
Воспользуемся методикой решения подобных задач [1, с. 108 -- 109]. Рассмотрим сначала элемент
стержня, находящийся на расстоянии 
от его середины (рисунок в прикреплённом файле). Заряд этого элемента 
Полагая его точечным, вычислим напряжённость поля этого заряда в заданной точке 
Получим
Искомая напряжённость поля в точке
равна сумме элементарных напряжённостей 
созданных в этой точке всеми элементами стержня. Так как поле равномерно заряженного стержня обладает осевой симметрией относительно оси 
и точка расположена на этой оси, то вектор напряжённости электрического поля в этой точке направлен вдоль оси 
При этом
Следовательно,
(В/м).
Литература
1. Фирганг Е. В. Руководство к решению задач по курсу общей физики. -- М.: Высшая школа, 1977. -- 351 c.
Воспользуемся методикой решения подобных задач [1, с. 108 -- 109]. Рассмотрим сначала элемент
стержня, находящийся на расстоянии от его середины (рисунок в прикреплённом файле). Заряд этого элемента Полагая его точечным, вычислим напряжённость поля этого заряда в заданной точке ПолучимИскомая напряжённость поля в точке
равна сумме элементарных напряжённостей созданных в этой точке всеми элементами стержня. Так как поле равномерно заряженного стержня обладает осевой симметрией относительно оси и точка расположена на этой оси, то вектор напряжённости электрического поля в этой точке направлен вдоль оси При этомСледовательно,
(В/м).Литература
1. Фирганг Е. В. Руководство к решению задач по курсу общей физики. -- М.: Высшая школа, 1977. -- 351 c.
Прикрепленные файлы:
5
Это самое лучшее решение!
Об авторе:
Facta loquuntur.
Facta loquuntur.
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