Question
Download Solution PDFDetermine the resistance of a 100 ft length of copper wire with a diameter of 20 mils. Assume resistivity ρ = 10.37 CM-Ω/ft
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept
The resistance of a wire is given by:
\(R=ρ{l\over A}\)
where, R = Resistance
ρ = Resistivity
l = Mean length per turn
A = Cross-sectional area
The area in circular mils is given by:
Area = d2 , where d is diameter
Calculation
Given, d = 20 mils
Area = 400 cm
\(R=10.37\times {100\over 400}\)
R = 2.59 Ω
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