Предмет: Физика, автор: K0367

помогите решить задание по физике

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Автор ответа: asterman

1

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0,5

Объяснение:

КПД электрической цепи вычисляется по формуле, что записана вверху слева. Напряжение внешнее, поделённое на ЭДС. КПД, судя по графику, 0.75, сила тока в той точке 1 Ампер. Сама ЭДС складывается из напряжений внутреннего (на источнике) и внешнего (в цепи), выражаю из этого напряжение внешнее и заменяю его в формуле. Дальше математика.

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