Question
(a) A DC power line for a light-rail system carries 1000 A at an angle of $30.0^\circ$ to the Earth’s $5.00 \times 10^{-5} \textrm{ T}$ field. What is the force on a 100-m section of this line? (b) Discuss practical concerns this presents, if any.
1. $2.5 \textrm{ N}$
2. $2.5 \textrm{ N}$ is insignificant. It is much less than the weight of the lines, or the force due to the wind.
Solution Video