A 160-V battery is connected across two parallel metal plates ofarea 28.5 cm^2 and separation 8.10 mm . A beam of alpha particles(charge +2e, mass 6.64×10^−27kg) is accelerated from rest through apotential difference of 1.60 kV and enters the region between theplates perpendicular to the electric field.
Part A: What magnitude of magnetic field is needed so that thealpha particles emerge undeflected from between the plates?
Part B: What direction of magnetic field is needed so that thealpha particles emerge undeflected from between the plates if thecharges are moving to the right and the electric field pointsupward?
