A 2.0 mm wire has which dimension?

A 2.0 mm wire has which dimension?

• A. 2.0 mm cross-section area
• B. 2.0 mm diameter
• C. 2.0 mm length
• D. 2.0 mm tensile strength

Answer: (A)

For a circular wire, the size or designation is a linear dimension describing how wide the wire is across its circular cross-section, which is its diameter. If a wire is labeled as 2.0 mm, that refers to a diameter of 2.0 mm. The cross-sectional area is a derived property, calculated from the diameter with A = π(d/2)^2. So for a 2.0 mm diameter wire, the cross-sectional area is π(1.0 mm)^2 ≈ 3.14 mm^2. In short, the 2.0 mm size indicates diameter, while the area is a separate quantity you compute from that diameter.

For a circular wire, the size or designation is a linear dimension describing how wide the wire is across its circular cross-section, which is its diameter. If a wire is labeled as 2.0 mm, that refers to a diameter of 2.0 mm. The cross-sectional area is a derived property, calculated from the diameter with A = π(d/2)^2. So for a 2.0 mm diameter wire, the cross-sectional area is π(1.0 mm)^2 ≈ 3.14 mm^2. In short, the 2.0 mm size indicates diameter, while the area is a separate quantity you compute from that diameter.