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Консультация № 196283
02.09.2019, 10:38
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Уважаемые эксперты! Пожалуйста, ответьте на вопрос:
Напряженность магнитного поля тороида со стальным сердечником возросла от H1=200 А/м до H2=800 A/м. определить во сколько раз изменилась объемная плотность энергии ω магнитного поля.
Напряженность магнитного поля тороида со стальным сердечником возросла от H1=200 А/м до H2=800 A/м. определить во сколько раз изменилась объемная плотность энергии ω магнитного поля.
Обсуждение
05.09.2019, 10:30
общий
это ответ
Здравствуйте, dar777!
В прикреплённом файле находится график зависимости магнитной индукции
в ферромагнетике от напряжённости 
намагничивающего поля, который я заимствовал на странице 288 [1]. Из этого графика видно, что
если
А/м, то 
Тл;
если
А/м, то 
Тл.
Тогда по формуле для относительной магнитной проницаемости [1, с. 295]
а по формуле для объёмной плотности энергии однородного магнитного поля [1, с. 305]
то есть объёмная плотность энергии магнитного поля тороида увеличилась в
раза.
Литература
1. Чертов А. Г., Воробьёв А. А. Задачник по физике. -- М.: Высш. шк., 1988. -- 527 с.
В прикреплённом файле находится график зависимости магнитной индукции
в ферромагнетике от напряжённости намагничивающего поля, который я заимствовал на странице 288 [1]. Из этого графика видно, чтоесли
А/м, то Тл;если
А/м, то Тл.Тогда по формуле для относительной магнитной проницаемости [1, с. 295]
а по формуле для объёмной плотности энергии однородного магнитного поля [1, с. 305]
то есть объёмная плотность энергии магнитного поля тороида увеличилась в
раза.Литература
1. Чертов А. Г., Воробьёв А. А. Задачник по физике. -- М.: Высш. шк., 1988. -- 527 с.
Прикрепленные файлы:
5
Это самое лучшее решение!
Об авторе:
Facta loquuntur.
Facta loquuntur.
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