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### Rotation

The rotation in a point of the field V is a differential operator that indicates the extent to which the direction of the field changes

##### Explanation

The rotation is a function of a three-dimensional vector field. If we take the field as a flow, then the rotation in each point indicates how fast and around which axis a flowing particle would rotate.

##### Example 1

The Maxwell equation of the electric current density is

where

∇× Rotation HMagnetic field strength DElectric displacement tTime JElectric current density