# Formula Circular Motion in the Magnetic Field Period    Magnetic field    Electric charge    Mass

## Period

Unit
Time needed for the charge in the magnetic field to make exactly one revolution.

## Magnetic field

Unit
Magnetic flux density, which indicates how strong the external magnetic field is in which the charge is orbiting.

## Electric charge

Unit
Magnitude of a positive or negative, circling charge. Sign of the charge makes no sense here, because otherwise the time would be negative.

## Mass

Unit
Mass of the charged particle.