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Консультация № 179875
07.09.2010, 23:31
0.00 руб.
0
3
1
Здравствуйте Уважаемые Эксперты. Помогите пожалуйста решить задачу.
Электрон движется прямолинейно и равномерно со скоростью υ = 3•105 м/с. Найти индукцию В поля, создаваемого электроном в точке, находящейся на расстоянии от него
r= 1•10-9 м (10А) и лежащей на перпендикуляре к v, проходящем через мгновенное положение электрона. (отв B=5,5 мкТл)
Электрон движется прямолинейно и равномерно со скоростью υ = 3•105 м/с. Найти индукцию В поля, создаваемого электроном в точке, находящейся на расстоянии от него
r= 1•10-9 м (10А) и лежащей на перпендикуляре к v, проходящем через мгновенное положение электрона. (отв B=5,5 мкТл)
Обсуждение
08.09.2010, 00:37
общий
это ответ
Здравствуйте, Massimo.
Рассмотрим короткий участок траектории длиной dl вблизи мгновенного положения в рассматриваемый момент времени.
Электрон проходит этот участок траектории за промежуток времени
при этом переносится элементарный заряд e
В данном фрагменте траэктории в данный промежуток времени перемещение электрона эквивалентно току
Подставляем найденное в формулу закона Био-Савара-Лапласа, учитывая, что это единственный фрагмент траектории, в котором в данный промежуток времени наблюдается ток
Подставляем значения
B=10-7Н/А[sup]2[/sup]*1,6*10-19Кл*3*105м/с/(10-9м)2=0,0048 Тл=4,8 мТл
Что-то не совсем сходится с Вашим ответом, возможно, Вы неверно списали условие или ответ, либо в задачнике опечатка.
Рассмотрим короткий участок траектории длиной dl вблизи мгновенного положения в рассматриваемый момент времени.
Электрон проходит этот участок траектории за промежуток времени
при этом переносится элементарный заряд e
В данном фрагменте траэктории в данный промежуток времени перемещение электрона эквивалентно току
Подставляем найденное в формулу закона Био-Савара-Лапласа, учитывая, что это единственный фрагмент траектории, в котором в данный промежуток времени наблюдается ток
Подставляем значения
B=10-7Н/А[sup]2[/sup]*1,6*10-19Кл*3*105м/с/(10-9м)2=0,0048 Тл=4,8 мТл
Что-то не совсем сходится с Вашим ответом, возможно, Вы неверно списали условие или ответ, либо в задачнике опечатка.
5
Большое спасибо за помощь!!!
08.09.2010, 00:41
общий
Значение, близкое к Вашему ответу получается при расстоянии 3*10-8 м. Перепроверьте данные.
Форма ответа
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