# Formula Circular Motion in a Magnetic Field Cyclotron radius    Velocity    Charge    Mass    Magnetic field

Unit
Cyclotron radius (also called Larmor radius) is the radius of the circular path along which a moving charge moves due to the Lorentz force.

## Velocity

Unit
Velocity component of the orbiting charge perpendicular to the magnetic field.

## Charge

Unit
Amount of electric charge of the orbiting particle.

## Mass

Unit
Mass of the orbiting charged particle.

## Magnetic field

Unit
Magnetic field through which the charge moves.