Answer
The electric force $F_{e}=qE$ and the magnetic force = $F_{B}=qvB$.
The purpose of the velocity selector is for the electric force to equal the magnetic force.
$qE=qvB$
or, $v=E/B$
which is independent of charge.
Work Step by Step
The electric force $F_{e}=qE$ and the magnetic force = $F_{B}=qvB$.
The purpose of the velocity selector is for the electric force to equal the magnetic force.
$qE=qvB$
or, $v=E/B$
which is independent of charge.
