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Консультация № 138296
28.05.2008, 15:18
0.00 руб.
0
1
1
Здравствуйте!
1)Поле создано равномерно заряженной сферической поверхностью с зарядом +q. Укажите направление вектора градиента потенциала в точке А. Рисунок не нарисовать, попробую объяснить, что нарисовано. Окружность, в центре точка О, заряд +q за пределами окружности. Точка О соединена линией с точкой А. Указаны направления от точки А: вверх, вниз, вправо, влево.
2) Поле создано точечным зарядом +q. Укажите направление вектора градиента потенциала в точке А. Рисунок: заряд +q соединен линией с точкой А. Указаны напраления: вверх, вниз, влева, вправо.
3) Как вообще искать направление вектора градиента потенциала в точке?
Заранее спасибо.
1)Поле создано равномерно заряженной сферической поверхностью с зарядом +q. Укажите направление вектора градиента потенциала в точке А. Рисунок не нарисовать, попробую объяснить, что нарисовано. Окружность, в центре точка О, заряд +q за пределами окружности. Точка О соединена линией с точкой А. Указаны направления от точки А: вверх, вниз, вправо, влево.
2) Поле создано точечным зарядом +q. Укажите направление вектора градиента потенциала в точке А. Рисунок: заряд +q соединен линией с точкой А. Указаны напраления: вверх, вниз, влева, вправо.
3) Как вообще искать направление вектора градиента потенциала в точке?
Заранее спасибо.
Обсуждение
31.05.2008, 03:26
общий
это ответ
Здравствуйте, Ланочка!
Вектор градиента потенциала в точке направлен от положительного заряда к этой точке (иными словами - вдоль "силовых линий" поля) - в первом случае от центра сферы, во втором - от точечного заряда +q. Поскольку Вы не указали, где находится точка А - справа, слева, сверху или снизу от центра сферы или точечного заряда +q - я не могу точно ответить. Надеюсь, Вы сами сообразите - например, если точка А - справа, то и вектор будет направлен от точки А вправо, и т.п.
Вектор градиента потенциала в точке направлен от положительного заряда к этой точке (иными словами - вдоль "силовых линий" поля) - в первом случае от центра сферы, во втором - от точечного заряда +q. Поскольку Вы не указали, где находится точка А - справа, слева, сверху или снизу от центра сферы или точечного заряда +q - я не могу точно ответить. Надеюсь, Вы сами сообразите - например, если точка А - справа, то и вектор будет направлен от точки А вправо, и т.п.
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