The welding machine is connected to the network with copper wires 100 m with a cross-sectional area of 50 mm2

The welding machine is connected to the network with copper wires 100 m with a cross-sectional area of 50 mm2. find the voltage on the wires if the amperage is 1.

To find out the voltage on the indicated copper wires, consider the equality: U / I = R (resistance of copper wires) = ρm * l / S, from where we express: U = I * ρm * l / S.
Const: ρm – beats. electrical resistance of copper (approx. ρm = 0.018 Ohm * mm2 / m).
Data: I – current in the wires (I = 125 A); l is the length of the wires (l = 100 m); S – total cross-sectional area (S = 50 mm2).
Let’s make a calculation: U = I * ρm * l / S = 125 * 0.018 * 100/50 = 4.5 V.
Answer: The voltage across the indicated copper wires should be 4.5 V.