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Консультация № 196394
18.09.2019, 13:43
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Уважаемые эксперты! Пожалуйста, ответьте на вопрос:
Напряжение на конденсаторе колебательного контура изменяется по закону U = 10*cos (2000 pi*t) В. Емкость равна 1 мкФ.
Найти:
3) индуктивность контура;
4) максимальный заряд конденсатора;
5) в какой момент времени величина силы тока впервые достигнет максимума?
6) Чему будет равно напряжение на конденсаторе в этот момент?
Напряжение на конденсаторе колебательного контура изменяется по закону U = 10*cos (2000 pi*t) В. Емкость равна 1 мкФ.
Найти:
3) индуктивность контура;
4) максимальный заряд конденсатора;
5) в какой момент времени величина силы тока впервые достигнет максимума?
6) Чему будет равно напряжение на конденсаторе в этот момент?
Обсуждение
20.09.2019, 09:03
общий
это ответ
Здравствуйте, arty324gh!
Имеем
В -- закон изменения напряжения на конденсаторе колебательного контура;
В -- амплитуда напряжения на обкладках конденсатора;
Ф -- ёмкость конденсатора;
с-1 -- циклическая частота свободных электромагнитных колебаний в контуре;
с -- период собственных колебаний в контуре [1, с. 393, 417]; тогда
(Гн)
-- индуктивность контура;
(Ф)
-- максимальный заряд конденсатора [1, с. 237];
Ф
-- закон изменения заряда на обкладках конденсатора;
А
-- закон изменения тока в колебательном контуре [1, с. 393];
из последнего выражения видно, что
А при 
то есть при 
[2, с. 340]; тогда 
а впервые абсолютная величина силы тока достигнет значения А при 
то есть в момент времени 
с;
в момент времени
с напряжение на конденсаторе составит
(В).
Литература
1. Аксенович Л. А., Ракина Н. Н., Фарино К. С. Физика в средней школе. -- Минск: Адукацыя i выхаванне, 2004. -- 720 с.
2. Зайцев В. В., Рыжков В. В., Сканави М. И. Элементарная математика. -- М.: Наука, 1974.
Имеем
В -- закон изменения напряжения на конденсаторе колебательного контура; В -- амплитуда напряжения на обкладках конденсатора; Ф -- ёмкость конденсатора; с-1 -- циклическая частота свободных электромагнитных колебаний в контуре; с -- период собственных колебаний в контуре [1, с. 393, 417]; тогда (Гн)-- индуктивность контура;
(Ф)-- максимальный заряд конденсатора [1, с. 237];
Ф-- закон изменения заряда на обкладках конденсатора;
А-- закон изменения тока в колебательном контуре [1, с. 393];
из последнего выражения видно, что
А при то есть при [2, с. 340]; тогда а впервые абсолютная величина силы тока достигнет значения А при то есть в момент времени с;в момент времени
с напряжение на конденсаторе составит (В).Литература
1. Аксенович Л. А., Ракина Н. Н., Фарино К. С. Физика в средней школе. -- Минск: Адукацыя i выхаванне, 2004. -- 720 с.
2. Зайцев В. В., Рыжков В. В., Сканави М. И. Элементарная математика. -- М.: Наука, 1974.
Об авторе:
Facta loquuntur.
Facta loquuntur.
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