q = −e · m = 1
ELECTRICITY & MAGNETISM · LAB 31
Charged particles in magnetic fields
Launch particles through adjustable electric and magnetic fields. Compare curvature, helices, velocity selection and mass separation.
SIMULATIONRUNNING
⊙ B out of screen⊗ B into screen
r = mv⊥ / |q|B
|F| = |q|v⊥B
f = |q|B / 2πm
no impacts
WHAT TO NOTICE
The force is sideways
A magnetic field changes a charged particle’s direction, not its speed. Positive and negative charges curve in opposite directions. A velocity component parallel to the field remains unchanged, producing a helix.
F = q(E + v × B)r = mv⊥ / |q|Bω = |q|B / m
Educational, non-relativistic model using scaled units. It is not suitable for engineering or safety calculations.