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Консультация № 188861
27.02.2016, 16:37
0.00 руб.
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1
Здравствуйте! У меня возникли сложности с таким вопросом:
Две бесконечные параллельные плоскости заряжены с поверхностной плотностью заряда q=2,8*10^-6 Кл/m^2 и расположены на расстоянии 8 см друг от друга. Необходимо определить напряженность электростатического поля вне этих плоскостей.
Две бесконечные параллельные плоскости заряжены с поверхностной плотностью заряда q=2,8*10^-6 Кл/m^2 и расположены на расстоянии 8 см друг от друга. Необходимо определить напряженность электростатического поля вне этих плоскостей.
Обсуждение
27.02.2016, 22:11
общий
это ответ
Здравствуйте, Ekim!
Напряжённость электрического поля равномерно заряженной плоскости с поверхностной плотностью заряда [$963$] в среде с диэлектрической проницаемостью [$949$] (для воздуха [$949$][$8776$]1) составляет
E1=[$963$]/2[$949$][$949$]0
и не зависит от расстояния от плоскости (пока оно мало по сравнению с её размерами). Напряжённость направлена от плоскости (при положительном заряде).
Для двух параллельных плоскостей с одинаковыми плотностями заряда (при одном и том же знаке) напряжённости между плоскостями компенсируются, а вне них - складываются.
Таким образом, вне плоскостей напряжённость равна удвоенной напряжённости одной плоскости:
E2=2E1=[$963$]/[$949$][$949$]0=2,8[$183$]10-6Кл/м2/(1[$183$]8,85[$183$]10-12Ф/м)=3,16[$183$]105В/м=316кВ/м
От расстояния между плоскостями ответ не зависит.
Напряжённость электрического поля равномерно заряженной плоскости с поверхностной плотностью заряда [$963$] в среде с диэлектрической проницаемостью [$949$] (для воздуха [$949$][$8776$]1) составляет
E1=[$963$]/2[$949$][$949$]0
и не зависит от расстояния от плоскости (пока оно мало по сравнению с её размерами). Напряжённость направлена от плоскости (при положительном заряде).
Для двух параллельных плоскостей с одинаковыми плотностями заряда (при одном и том же знаке) напряжённости между плоскостями компенсируются, а вне них - складываются.
Таким образом, вне плоскостей напряжённость равна удвоенной напряжённости одной плоскости:
E2=2E1=[$963$]/[$949$][$949$]0=2,8[$183$]10-6Кл/м2/(1[$183$]8,85[$183$]10-12Ф/м)=3,16[$183$]105В/м=316кВ/м
От расстояния между плоскостями ответ не зависит.
5
Роман, вы выручаете)
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