Controls

Electric Field linearly accelerates $e^{-}$ from voltage in Electron Gun: Va
Magnetic Field circularly accelerates $e^{-}$ from current in Helmholtz coils through coils: Iα

Schematic Diagram

Schematic layout of the experiment about electron deflection in a magnetic field

Trajectories of Electrons Moving Perpendicular to an Uniform Magnetic Field

Picture of the real experiment for deflection of electrons in a magnetic field
Grid for data logging

Useable Variables:

m  = mass of an electron
e  = charge of an electron
v0 = velocity of the electron
B  = strength of magnetic field

Typing tip:

x² must be typed as x*x