1. The problem statement, all variables and given/known data An ion with a charge of +1e enters a region where the electric field produced by parallel plates at 630V separated by 7.0mm is at right angles ot a magnetic field B=450mT. The ion moves a straight line. Find the magnitude of the electric field and the speed of the ion. 2. Relevant equations F=qvB Ampere's Law B=μ0I/2∏r 3. The attempt at a solution Is this a mass spectrometer? first of all, because the plates are parellel the force is maximized (sin90=1) I am confused, isn't the ion supposed to curve in a radius defined by: r=mv/qB (mv2/r=qvB) I just don't know what to do since the ion doesn't curve. Thanks.