magnetic field
  • The region in space surrounding a magnetic body or entity, such as a permanent magnet or a conductor carrying a current, where an appreciable magnetic force is present. Such a field is represented by magnetic lines of force. The planet earth has a magnetic field, and its lines of force are considered to extend from the north magnetic pole to the south magnetic pole.
  • In an electromagnetic field, the magnetic field. The magnetic field is perpendicular to the electric field.

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