Problem: A parallel-plate capacitor has 2 cm x 2 cm electrodes with surface densities +- (plus and minus) 1 x 10-6 C/m2. A proton travelling parallel to the electrodes at 1 x 106 m/s enters the center of the gap between them.
Part A: By what distance has the proton been deflected sideways when it reaches the far edge of the capacitor? Assume the field is uniform inside the capacitor and zero outside the capacitor.
Please help for the above problem, completely confused!! Show each steps if possible, Thanks.