1. The problem statement, all variables and given/known data A 200m long copper wire, with cross section area of 1.5mm2, is connected with a 10Ω resistor in a series circuit, and the supply voltage is 50V. 2. Relevant equations Find the power loss in the copper wire, when ρ=0.0175 Ωmm2/m 3. The attempt at a solution R=*L/A P=V2/R P=502/(0.0175*(200/1.5)) P=1068.37 Watt.