A long, straight cylindrical wire conductor of radius $R=2\mathrm{.}0mm$ carries a current $I=60A$ of uniform current density in the conductor. Calculate the magnetic field due to this current at $r=1\mathrm{.}0mm.$

Select one:

a$.1{10}^{-3}$ Tesla

b$.$

$3{10}^{-3}$ Tesla

c$.$

$6{10}^{-3}$ Tesla

d$.$

$4{10}^{-3}$ Tesla