a$)$

A wire is held horizontally in a vacuum chamber, and carries a current of $2\mathrm{.}70$A$.$ A proton is traveling in a direction parallel to the wire $($opposite the current$)$ with a constant speed of $2\mathrm{.}60104$ m$/$s at a distance d above the wire. Ignoring the magnetic field due to the Earth, determine the value of d $($in cm$).$

cm

$($b$)$

What If$?$ At what distance d $($in m$)$ would an electron moving with the same speed as the proton move parallel to the wire?

m

$($a$)60\mathrm{.}0$

N

$($b$)90\mathrm{.}0$

N

$($c$)120$

N