Tìm kiếm
Nguyen Nguyen
2 năm trước

tính điện trở của 1dây nhôm có chiều dài 120cm,đường kính 2mm

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dothidung933
2 năm trước

đổi 2mm=0.002m

120cm=0.12m

s dây

=3,14.0,002/2=0.00314m2

ADCT

R=2,8.10mu-8.012.0.00314=1,68 . 10-3

Biet Ko
2 năm trước

s = 2mm . 10-6 m2

l = 120cm = 0,12 m

Dien tro cua day nhom la

R= p.1  = 2,8.10 - 8 0,12   = 1,68 . 10-3

       s             2.10 -6

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