Предмет: Физика, автор: autink100

Во сколько раз сопротивление нихромовой проволоки длиной 9 м больше сопротивления никелевой проволоки такой же длины и такого же сечения?

Ответы

Автор ответа: viktortiunov12

Ответ:

Нужно обратиться к таблице удельного сопротивления.

Сопротивление нихрома ≈ 1

Сопротивление свинца ≈ 0.2

Сопротивление считается по формуле:

Сопротивление=Уд. сопротивление* длина проводника/площадь сечения.

Так как и длина и сечение одинаковы сравниваем только уд. сопротивления:

1>0.2 в 5 раз.

Ответ: в 5 раз

Объяснение:

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