All,
Where does the constant: 1.66242611301 x 10-7 ohm centimeter come from?
How is it derived?
Also, why is the following true:
1 circular mil ohm/foot = 1.66242611301 x 10-7 ohm centimeter
Thanks,
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Unit conversion: A "circular mil" is the area of a circle with a diameter of 0.001 inch (0.0254mm). That's about 5.07 * 10^-4 mm^2, or 5.07 * 10^-6 cm^2.
A foot is 30.48 cm.
1 circular mil / 1 foot = 5.07 * 10^-6 cm^2 / 30.48 cm = 1.66 * 10^-7 cm.
"ohm" is just along for the ride.
