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Mathematics
19 September, 22:08
Which formula is used to find circular mil area?
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Cassius Winters
19 September, 22:20
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The term circular mil is common in expressing the cross sectional area of a wire. Electrical wires have very minute diameters that are often measured a thousandth of an inch. Hence, when you find the area of the circular wire, for convenience, the unit used is circular mil which is equivalent to one-thousandth of an inch.
For example, a wire has a diameter of 6*10⁻⁵ inches. To find its area:
A = πr² = π (6*10⁻⁵ / 2) ² = 2.83*10⁻⁹ in²
Since 1 mil = 1/1000 (inch) or 0.001 inch
A = (2.83*10⁻⁹ in²) * (1 mil / 0.001 inch) ²
A = 0.00283 circular mils
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