To solve this problem, we need to calculate the power loss in the copper wire.$\\$Given:$\\$• Distance between the two cities $= 150$ km$\\$• Fall of potential per km $= 8$ V$\\$• Average resistance per km $= 0.5 \Omega \\$First, calculate the total voltage drop across the entire length of the wire:$\\ V_{total} =$Fall of potential per km$\times$Distance$\\ V_{total} = 8 \,$V/km$\times 150 \,$km$\\ V_{total} = 1200 \,$V$\\$Next, calculate the total resistance of the wire:$\\ R_{total} =$Resistance per km$\times$Distance$\\ R_{total} = 0.5 \, \Omega/$km$\times 150 \,$km$\\ R_{total} = 75 \, \Omega \\$The power loss in the wire can be calculated using the formula:$\\ P = \frac{V_{total}^2}{R_{total}} \\$Substitute the known values:$\\ P = \frac{1200^2}{75} \\$Calculate:$\\ P = \frac{1440000}{75} \\ P = 19200 \,$W$\\$Convert the power loss to kilowatts:$\\ P = 19200 \,$W$= 19.2 \,$kW$\\$Therefore, the power loss in the wire is $19.2 \,$kW$. \\$This corresponds to Option 2.