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Для 8 класса

Что называют электрическим зарядом? Физическая величина, характеризующая свойство тел или частиц вступать в электрическое взаимодействие.
Как взаимодействуют одноименные и разноименные электрические заряды? 1) Одноименные электрические заряды отталкиваются друг от друга. 2) Разноименные электрические заряды притягиваются друг к другу.
Сформулируйте и запишите закон сохранения электрического заряда. Сумма зарядов в замкнутой системе остается постоянной. q1+q2+…+qn=const
В каких случаях выполняется закон сохранения электрического заряда? Система тел, которая не взаимодействует с другими окружающими ее телами, называется замкнутой, или изолированной. В этой системе явление электризации подчиняется закону сохранения электрического заряда.
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