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I = 10 A
t = 10 s
R = ...?
V = W/It
= 10.000/10 x 10
= 100 V
R = V/I
= 100/10 = 10 Ω
R = 4 Ω
L = 1 m
A = 0,35 mm² = 0,35 x 10⁻⁶ m²
ρ = ...?
ρ = RA/L
= 4 x 0,35 x 10⁻⁶/1
= 1,4 x 10⁻⁶ Ωm