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suter [353]
3 years ago
9

What is the resistance of a 3.1 m length of copper wire 1.7 mm in diameter?

Physics
1 answer:
8_murik_8 [283]3 years ago
4 0
Resistance can be obtained by the following formula:

R = <span>ρ (L/A)

where:
R = resistance
</span>ρ = resistivity of copper (<span>1.68<span>x10^-8</span></span>)
L = Length = 3.1m
A = cross-sectional area = pi * (d/2)^2 = pi * (1.7mm)^2 = 2.269 mm^2

R = (1.68x10^-8) (3.1 / 0.0000022698)
R = 0.0229 <span>Ω</span>
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