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Консультация № 179909
11.09.2010, 18:01
0.00 руб.
0
5
1
1. При какой силе тока I, текущего по тонкому проводящему кольцу радиусом R=0,2м, магнитная индукция в точке, равноудалённой от всех точек кольца на расстояние 0,3м, станет равной 20 мкТл?
2. Катушка длиной l=30см имеет 1000 витков. Найти напряжённость магнитного поля внутри катушки, если по витку проходит ток I=2A. Диаметр катушки << её длины.
2. Катушка длиной l=30см имеет 1000 витков. Найти напряжённость магнитного поля внутри катушки, если по витку проходит ток I=2A. Диаметр катушки << её длины.
Обсуждение
11.09.2010, 18:13
общий
это ответ
Здравствуйте, Шинкаренко Сергей Владимирович.
Задача 2.
По условию диаметр катушки намного меньше ее длины, тогда катушку можно считать бесконечно длинным соленоидом, для которого
H=In, где n=N/l - число витков на единицу длины. Таким образом,
H=I*N/l
Подставляем числовые данные:
H=2*1000/0,3=6667А/м=6,67кА/м
Задача 2.
По условию диаметр катушки намного меньше ее длины, тогда катушку можно считать бесконечно длинным соленоидом, для которого
H=In, где n=N/l - число витков на единицу длины. Таким образом,
H=I*N/l
Подставляем числовые данные:
H=2*1000/0,3=6667А/м=6,67кА/м
5
11.09.2010, 18:30
общий
Шинкаренко Сергей Владимирович:
1 Задача
Решение:
Запишем закон Био-Савара-Лапласа для кругового тока
B=([$956$][$956$]0/2)*(R2I/r3) (1)
Определим из уравнения (1) силу тока I, создающего в заданной точке А магнитное поле с индукцией B
I=2Br3/([$956$][$956$]0R2)
где [$956$]0 - Магнитная постоянная, равная 4π*10-7Гн/м
Подставляем числовые данные:
I=2*2*10-5*0,027/(12,56*10-7*0,04)=0,108*10-5/0,5024*10-7=21,5А
1 Задача
Решение:
Запишем закон Био-Савара-Лапласа для кругового тока
B=([$956$][$956$]0/2)*(R2I/r3) (1)
Определим из уравнения (1) силу тока I, создающего в заданной точке А магнитное поле с индукцией B
I=2Br3/([$956$][$956$]0R2)
где [$956$]0 - Магнитная постоянная, равная 4π*10-7Гн/м
Подставляем числовые данные:
I=2*2*10-5*0,027/(12,56*10-7*0,04)=0,108*10-5/0,5024*10-7=21,5А
Неизвестный
12.09.2010, 08:25
общий
Massimo:
Здравствуйте, Massimo не могли бы вы пояснить формулу:B=(μμ0/2)*(R2I/r3)...
Здравствуйте, Massimo не могли бы вы пояснить формулу:B=(μμ0/2)*(R2I/r3)...
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