(a) A DC power line for a light-rail system carries [tex]1000 \mathrm{~A}[/tex] at an angle of [tex]30.0^{\circ}[/tex] to the Earth's [tex]5.00 \times 10^{-5}[/tex]. T field. What is the force on a 100-m section of this line? (b) Discuss practical concerns this presents, if any.
