American Wire Gauge (AWG) Size Chart | AWG Sizes
Where A is the area of the circle in circular mils and d is the diameter in mils. Wire Size Example. Find the cross-sectional area of a wire 0.0280″ in diameter. Solution $begin{align} & d=0.02800"=28text{ }mills & A={{d}^{2}}={{28}^{2}}=784text{ }CM end{align}$ Resistivity Definition.
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