Предмет: Физика, автор: myassbig171

на рисунке изображен участок электрической цепи AB,состоящий из четырех резисторов.Каким должно быть сопротивление резистора Rx,чтобы при замыкании ключа сопротивление участка AB не изменилось?Велечину R считать известной.

Приложения:

Ответы

Автор ответа: DedStar

Ответ:

Объяснение:

При незамкнутом ключе схема выглядит так (см. схему 1)

Если замкнуть цепь, то получаем мостик Уинтсона (см. схему 2)

Тогда:

R / (2R) = 2R / Rₓ

Rₓ = 2R·2R / R

Rₓ = 4R

Приложения:

aallllll: Здравствуйте, Помогите пожалуйста решить задачу Теор механика

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