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Консультация № 179226
25.06.2010, 13:45
36.09 руб.
0
1
1
Здравствуйте уважаемые эксперты решите пожалуйста эту задачу:
На двух коаксиальных бесконечных цилиндрах радиусами R и 2R равномерно распределены заряды с поверхностными плотностями σ1 и σ2 (рис. 26). Требуется: 1 ) найти сквозную зависимость Е(r для трех областей: I, II и III. Здесь: Е - напряженность электрического поля в точке наблюдения, r – расстояние от оси цилиндров до точки наблюдения. Принять σ1 = –2σ, σ2 = σ; 2) вычислить напряженность Е в точке, удаленной от оси цилиндров на расстояние г, и указать направление вектора Е. Принять σ = 50 нКл/м2, r= 1,5R; 3) построить график Е(r).
На двух коаксиальных бесконечных цилиндрах радиусами R и 2R равномерно распределены заряды с поверхностными плотностями σ1 и σ2 (рис. 26). Требуется: 1 ) найти сквозную зависимость Е(r для трех областей: I, II и III. Здесь: Е - напряженность электрического поля в точке наблюдения, r – расстояние от оси цилиндров до точки наблюдения. Принять σ1 = –2σ, σ2 = σ; 2) вычислить напряженность Е в точке, удаленной от оси цилиндров на расстояние г, и указать направление вектора Е. Принять σ = 50 нКл/м2, r= 1,5R; 3) построить график Е(r).
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