Sanvas

Question $3$

$10$ pts

A long rectangular wire $($illustrated below but not drawn to scale$)$ of thickness $t=0\mathrm{.}01m$ has a drift speed of electrons of $v_d=2{10}^{-4}\frac{m}{s}.$ If the wire has a current of $I=40$A along its length and a number density of free electrons of $,$ what is the width $w$ of the wire? Use the magnitude of the charge of the electron of $q=1{10}^{-19}C.$ Hint: use the relations for current density.

$618$