# Force on a DC Power Line#

## Question Text#

A DC power line for a light-rail system carries $${{params.I}}\textrm{ A}$$ at an angle of $${{params.theta}}^{\circ}$$ to the $$5.0 \times 10^{-5}\textrm{ T}$$ field of the Earth. What is the force on a $${{params.L}}\textrm{ m}$$ section of this line?