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

Formula
Formula: Circular Motion in the Magnetic Field
Lorentz force: electron in a magnetic field
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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.