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Консультация № 179367
01.07.2010, 20:31
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Здравствуйте,
Проводник длиной l = 1 м движется со скоростью v = 5 м/с перпендикулярно к линиям индукции однородного магнитного поля. Определить величину индукции магнитного поля, если на концах проводника возникает разность потенциалов 0,02 В.
Проводник длиной l = 1 м движется со скоростью v = 5 м/с перпендикулярно к линиям индукции однородного магнитного поля. Определить величину индукции магнитного поля, если на концах проводника возникает разность потенциалов 0,02 В.
Обсуждение
Неизвестный
01.07.2010, 23:51
общий
это ответ
Здравствуйте, noobjkee!
Из формулы для нахождение индукционного тока находим:
B=E/l*v=4мТс, где E-индукционный ток.
Из формулы для нахождение индукционного тока находим:
B=E/l*v=4мТс, где E-индукционный ток.
Неизвестный
02.07.2010, 09:33
общий
это ответ
Здравствуйте, noobjkee.
Будем исходить из закона Фарадея об электромагнитной индукции.
Изменение магнитного потока порождает ЭДС в замкнутом контуре.
Когда проводник движется, то он фактически заметает собой некий контур, который увеличивается в размерах, тем самым изменяя внутри себя магнитный поток.
ЭДС в таком контуре это -dФ/dt
dФ распишем как B*dS
dS как l*da
da как v*dt
получим
dФ = B*l*v*dt
ЭДС получается B*l*v
так как проводник не замкнут то ЭДС и разность потенциалов равны, тогда
B=U/(l*v)
B = 0,02/5 = 0,004 Тл = 4мТл
Будем исходить из закона Фарадея об электромагнитной индукции.
Изменение магнитного потока порождает ЭДС в замкнутом контуре.
Когда проводник движется, то он фактически заметает собой некий контур, который увеличивается в размерах, тем самым изменяя внутри себя магнитный поток.
ЭДС в таком контуре это -dФ/dt
dФ распишем как B*dS
dS как l*da
da как v*dt
получим
dФ = B*l*v*dt
ЭДС получается B*l*v
так как проводник не замкнут то ЭДС и разность потенциалов равны, тогда
B=U/(l*v)
B = 0,02/5 = 0,004 Тл = 4мТл
02.07.2010, 16:20
общий
sashabailo:
Из формулы для нахождение индукционного тока находим - просветите, если не трудно, что такое это за формула (для нахождения индукционного тока)?
В формуле, которую вы применили, никакого индукционного тока нет.
где E-индукционный ток. - В данном случае Е - это ЭДС индукции (электродвижущая сила), которая равна, в условиях данной задачи, напряжению (разности потенциалов) U.
4мТс - а это что? может быть 4 мТл?
С уважением
Из формулы для нахождение индукционного тока находим - просветите, если не трудно, что такое это за формула (для нахождения индукционного тока)?
В формуле, которую вы применили, никакого индукционного тока нет.
где E-индукционный ток. - В данном случае Е - это ЭДС индукции (электродвижущая сила), которая равна, в условиях данной задачи, напряжению (разности потенциалов) U.
4мТс - а это что? может быть 4 мТл?
С уважением
Об авторе:
С уважением
shvetski
С уважением
shvetski
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