Problem $9\mathrm{.}2$

A wire of length L$,$ area A and resistivity has a potential difference of $$V between its ends. Consider an electron halfway between the center of the wire and the surface that is moving parallel to the wire at the drift speed. $($a$)$ Symbolically calculate the ratio of electric force on the electron to the magnetic force on the electron first, then $($b$)$ check your calculation using these given numbers: a $2\mathrm{.}5-$m$-$long, $2\mathrm{.}0-$mm$-$diameter aluminum wire has a potential difference of $1\mathrm{.}5$ V between its ends. Hint: model aluminum as ohmic. Answer: $4\mathrm{.}0104$