A beam of protons is accelerated easterly from rest through apotential difference of 5.0kV. It enters a region where thereexists an upward pointing uniforn electric field. This field iscreated by two parallel plates separated by 17cm with a potentialdifference of 250 V across them.
a) What is the speed of the protons as they enter the electric field?
b) Find the magnitude of the magnetic field (perpendicular tothe electric field) needed so the beam passes undeflected throughthe plates.