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# Force on a Proton at Rest

APPHEM-WMZ2LJ

A proton of charge $e$ is placed at restmidway between two parallel wires $a$ distance apart, each carrying current $I$ in the same direction.

The magnetic force on the proton is:

A

$0$

B

$ev_0 \cfrac {\mu_{0}I}{2{\pi} a}$

C

$ev_0 \cfrac{\mu_0I}{{2\pi (2a)}}$

D

$ev_0 \cfrac{\mu_{0}I}{2{\pi}\cfrac{a}{2}}$

E

Unable to be determined.