Pole

pole

1. A point in an electromagnetic field at which electric or magnetic field lines converge.

   
   

   
   See also dipole, magnetic dipole.

   
   
2. For any circle on the surface of a sphere, the point of intersection of the surface of the sphere and the normal line through the center of the circle.

   
   

   The North and South geographic poles are the poles of the equator or of any other latitude circle.

   
   
3. The origin of a system of polar coordinates.

   
   

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