# 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

## Task:Determine the formula for the radius of the electron orbit using Centripetal and Lorentz force.

Enter your solution into the input fields below.
$F_{\rm{Zentripetal}} = m\frac{{v_0}^2}{r}$ $$F_{\rm{Lorentz}} = e\cdot v_0 \cdot B$$
 r =

## 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