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L = 2,5 m
A = 0,05 cm² = 0,05x10⁻⁴ m²
ρ = 1,6x10⁻⁸Ωm = 1,6x10⁻¹¹Ω
ditanyakn : R ?
dijawab :
R = ρ L/A
= 1,6x10⁻¹¹ (2,5/0,05x10⁻⁴)
= 1,6x10⁻¹¹ x 50x10⁴
= 80x10⁻⁷
= 8x10⁻⁶ Ω