Why is copper wire tinned? For example, in particular, some European standard wires are mostly tinned copper wire? I want to ask, the conductivity of copper wire should be better than that after tinning, and when the skin effect is obvious in high-frequency circuits, the performance of tinned wire is far worse than that of ordinary copper wire There are many tinned wires in the market. Why Don't tell me it's just for welding

Why is copper wire tinned? For example, in particular, some European standard wires are mostly tinned copper wire? I want to ask, the conductivity of copper wire should be better than that after tinning, and when the skin effect is obvious in high-frequency circuits, the performance of tinned wire is far worse than that of ordinary copper wire There are many tinned wires in the market. Why Don't tell me it's just for welding

Tin plated copper wire can prevent rubber insulation from sticking, make the core black and brittle, and improve its solderability. Tin plated copper wire is mainly used for rubber insulated mining cables, flexible wires, flexible cables and marine cables as conductive core, as well as as as outer shielding braid and brush wire of cables

The meaning of each letter in the expression of the law of resistance and the meaning of each letter in the calculation formula of resistivity

R = PL / s, where p is the resistivity of the conductor, in Ω· mm ^ 2 / M.L is the length of the conductor, in M.S is the cross-sectional area of the conductor, in mm ^ 2

What is the formula for measuring the resistivity of single copper wire

From resistance = resistivity * length / cross-sectional area, resistivity = resistance * cross-sectional area / length