Question
Asked Nov 12, 2019
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How do you determine how much current will be flowing through a 40.0 m length of copper wire with radius 4.0 mm if it is connected to a source supplying 16.0 V? (The resistivity of copper is 1.68 ⋅ 10-8 Ω m.)  

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Step 1

Given:

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Resistivity 1.68x 10 Length 40m Radius 4mm 0.004m Area (Radius) =7 x (0.004)

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Step 2

Thus,

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(Resistivity x Length) Resistance Area (1.68 x10x 40) - 0.01337 X(0.004) or R = V Current,I R 16 or,I 0.01337 or,I 1196.797 A

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Physics

Current Electricity

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