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Консультация № 195853
15.06.2019, 22:06
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Здравствуйте! У меня возникли сложности с таким вопросом:
Найти объёмную плотность энергии электрического поля в точке, находящейся на расстоянии 2 см от поверхности заряженного шара радиусом в 1 см. Поверхностная плотность заряда на шаре 5×10-6 Кл/м2, диэлектрическая проницаемость среды ε = 2. Вычислить ёмкость и полную энергию шара.
Найти объёмную плотность энергии электрического поля в точке, находящейся на расстоянии 2 см от поверхности заряженного шара радиусом в 1 см. Поверхностная плотность заряда на шаре 5×10-6 Кл/м2, диэлектрическая проницаемость среды ε = 2. Вычислить ёмкость и полную энергию шара.
Обсуждение
18.06.2019, 11:54
общий
это ответ
Здравствуйте, dar777!
Обозначим
-- расстояние от поверхности шара до заданной точки; 
-- радиус шара; 
-- поверхностная плотность заряда на шаре
По формуле на с. 363 [1] заряд шара составляет
по формуле на с. 365 [1] напряжённость электростатического поля шара в заданной точке составляет 
по формуле на с. 391 [1] объёмная плотность энергии электрического поля в заданной точке составляет
(Дж/м3).
По формуле на с. 376 [1] электроёмкость шара составляет
(Ф).
По формуле на с. 390 [1] полная энергия заряженного шара составляет
(Дж).
Литература
1. Явлрский Б. М., Детлаф А. А., Лебедев А. К. Справочник по физике для инженеров и студентов вузов. -- М.: ООО "Издательство Оникс", 2007. -- 1056 с.
Обозначим
-- расстояние от поверхности шара до заданной точки; -- радиус шара; -- поверхностная плотность заряда на шареПо формуле на с. 363 [1] заряд шара составляет
по формуле на с. 365 [1] напряжённость электростатического поля шара в заданной точке составляет по формуле на с. 391 [1] объёмная плотность энергии электрического поля в заданной точке составляет (Дж/м3).По формуле на с. 376 [1] электроёмкость шара составляет
(Ф).По формуле на с. 390 [1] полная энергия заряженного шара составляет
(Дж).Литература
1. Явлрский Б. М., Детлаф А. А., Лебедев А. К. Справочник по физике для инженеров и студентов вузов. -- М.: ООО "Издательство Оникс", 2007. -- 1056 с.
5
Это самое лучшее решение!
Об авторе:
Facta loquuntur.
Facta loquuntur.
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