n aluminum conductor $($ $=3\mathrm{.}87107$ mho$/$m$)$ is $30$ m long and has circular cross$-$

section with a diameter of $20\mathrm{.}32$ mm$.$ If there is a d$.$c$.$ voltage of $1\mathrm{.}2$ V applied between

the ends, determine: $(15$ marks$)$

$($a$)$ Magnitude of current density.

$($b$)$ Current.

$($c$)$ Power dissipated