Предмет: Физика, автор: Liliyaa

найти силу тока в стальном проводнике длинной 10 м и сечение 2 мм кубических,на который подано напряжение 12 мВ.

Ответы

Автор ответа: dds

R=ρl/S

R=U/I

U/I=ρl/S

I=US/ρl

ρ=0,12

I=0,012*2/0,12*10=0,02 A

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