Предмет: Физика, автор: spixcyq

какую работу совершает электрический ток за 10 мин в утюге с сопротивлением 100 Ом, работающем от сети с напряжением 220В? Определите мощность электрического тока и ЭДС источника тока.

Ответы

Автор ответа: sergeydoow

Ответ:

Дано:

сопротивление утюга R = 100 Ом

напряжение источника тока U = 220 В

время работы утюга t = 10 мин = 600 с

Решение:

Для расчета работы W, которую совершает электрический ток за время t, используется формула:

W = UIt,

где I - сила тока, протекающего через утюг.

Сначала найдем силу тока I, используя закон Ома:

U = IR,

I = U / R = 220 В / 100 Ом = 2.2 А.

Теперь можем рассчитать работу:

W = UIt = 220 В × 2.2 А × 600 с = 290400 Дж.

Мощность электрического тока P можно вычислить, используя формулу:

P = UI,

где U - ЭДС источника тока.

Так как U и I мы уже знаем, то:

P = UI = 220 В × 2.2 А = 484 Вт.

ЭДС источника тока U равна напряжению на утюге, то есть 220 В.

Объяснение:

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