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Консультация № 203227
09.10.2022, 13:11
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Здравствуйте, уважаемые эксперты! Прошу вас ответить на следующий вопрос:
Два шарика равной массы, одинаково заряженных, подвешены в одной точке на нитях одинаковой длины. При погружении шариков в масло плотностью 800 г/см3 угол расхождения нитей не изменился. Определить диэлектрическую проницаемость масла.
Два шарика равной массы, одинаково заряженных, подвешены в одной точке на нитях одинаковой длины. При погружении шариков в масло плотностью 800 г/см3 угол расхождения нитей не изменился. Определить диэлектрическую проницаемость масла.
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Обсуждение
09.10.2022, 13:14
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Здравствуйте, не могли бы помочь с задачкой? Совсем не приложу ума как её решить, заранее спасибо)
09.10.2022, 13:39
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Задача из задачника Чертова приведена Вами не полностью и плотность масла чудовищная.
Исходное условие: Два одинаковых заряженных шарика подвешены в одной точке на нитях одинаковой длины. При этом нити разошлись на угол ?. Шарики погружаются в масло плотностью ?0=8*102 кг/м3. Определить диэлектрическую проницаемость ? масла, если угол расхождения нитей при погружении шариков в масло остается неизменным. Плотность материала шариков ?= 1,6*103 кг/м3.
Решение.
Электростатическая сила до погружения Fe; сила тяжести ro*V*g.
После погружения Fe/epsilon и (ro-ro0)*V*g.
Тангенс угла наклона нити сохранился, значит Fe/(Fe/epsilon)=ro*V*g/((ro-ro0)*V*g) или epsilon*(ro-ro0)=ro.
Откуда epsilon=ro/(ro-ro0)=1,6/(1,6-0,8)=2.
Исходное условие: Два одинаковых заряженных шарика подвешены в одной точке на нитях одинаковой длины. При этом нити разошлись на угол ?. Шарики погружаются в масло плотностью ?0=8*102 кг/м3. Определить диэлектрическую проницаемость ? масла, если угол расхождения нитей при погружении шариков в масло остается неизменным. Плотность материала шариков ?= 1,6*103 кг/м3.
Решение.
Электростатическая сила до погружения Fe; сила тяжести ro*V*g.
После погружения Fe/epsilon и (ro-ro0)*V*g.
Тангенс угла наклона нити сохранился, значит Fe/(Fe/epsilon)=ro*V*g/((ro-ro0)*V*g) или epsilon*(ro-ro0)=ro.
Откуда epsilon=ro/(ro-ro0)=1,6/(1,6-0,8)=2.
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