# Formula Current-Carrying Wire in Magnetic Field Magnetic force    Electric current    Length    Magnetic flux density (B-field)

## Magnetic force

Unit
The magnetic part of the Lorentz force acts on a current-carrying conductor when it is in the magnetic field. This formula is only valid if the magnetic field direction is exactly perpendicular to the current direction.

## Electric current

Unit
Electric charge per unit time flowing through the wire.

## Length

Unit
The longer the wire through which a current flows, the greater the Lorentz force on that wire.

## Magnetic flux density (B-field)

Unit
Magnetic flux density indicates how strong the magnetic field is in which the wire is located. The magnetic field can be generated, for example, with another current-carrying wire that is brought close to the first wire.