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Консультация № 181836
11.01.2011, 18:55
49.39 руб.
0
4
1
Здравствуйте! У меня возникли сложности с таким вопросом:
Протон влетает в однородное магнитное поле под углом 60 град. к силовым линиям и движется по винтовой линии ,радиус которой 1,5 см индукция магнитного поля 10 мТл . Найти кинетическую энергию протона?
СПАСИБО!!!
Протон влетает в однородное магнитное поле под углом 60 град. к силовым линиям и движется по винтовой линии ,радиус которой 1,5 см индукция магнитного поля 10 мТл . Найти кинетическую энергию протона?
СПАСИБО!!!
Обсуждение
11.01.2011, 19:51
общий
это ответ
Здравствуйте, смирнов игорь!
Сила Лоренца определяется по формуле F=qvB[$183$]sin[$945$]
Центростремительное ускорение a=(v[$183$]sin[$945$])2/R
Согласно второму закону Ньютона F=ma
qvB[$183$]sin[$945$]=m(v[$183$]sin[$945$])2/R
qB=mv[$183$]sin[$945$]/R
v=qBR/(m[$183$]sin[$945$])
Wk=mv2/2=(qBR)2/(2m[$183$]sin2[$945$])=
=(1,6[$183$]10-19Кл[$183$]0,01Тл[$183$]0,015м)2/(2[$183$]1,67[$183$]10-27кг[$183$]sin260[$176$])=2.3[$183$]10-19 Дж
Сила Лоренца определяется по формуле F=qvB[$183$]sin[$945$]
Центростремительное ускорение a=(v[$183$]sin[$945$])2/R
Согласно второму закону Ньютона F=ma
qvB[$183$]sin[$945$]=m(v[$183$]sin[$945$])2/R
qB=mv[$183$]sin[$945$]/R
v=qBR/(m[$183$]sin[$945$])
Wk=mv2/2=(qBR)2/(2m[$183$]sin2[$945$])=
=(1,6[$183$]10-19Кл[$183$]0,01Тл[$183$]0,015м)2/(2[$183$]1,67[$183$]10-27кг[$183$]sin260[$176$])=2.3[$183$]10-19 Дж
12.01.2011, 12:00
общий
Адресаты:
поясните почему для расчета ускорения берете скорость умноженную на синус?
Об авторе:
to live is to die
to live is to die
12.01.2011, 13:42
общий
Адресаты:
Центростремительное ускорение под действием силы Лоренца изменяет только перпендикулярные магнитным линиям составляющие скорости.
Движение по спирали можно рассматривать как сумму двух движений:
1) параллельно магнитным линиям (что не порождает силу Лоренца) со скоростью v[$183$]cos[$945$]
2) по окружности в перпендикулярной магнитным линиям плоскости (под действием силы Лоренца) со скоростью v·sinα
Движение по спирали можно рассматривать как сумму двух движений:
1) параллельно магнитным линиям (что не порождает силу Лоренца) со скоростью v[$183$]cos[$945$]
2) по окружности в перпендикулярной магнитным линиям плоскости (под действием силы Лоренца) со скоростью v·sinα
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