#field_strength__fieldstrength__field_intensity__fieldintensity  the vector sum of all the forces exerted by an electrical or magnetic field (on a unit mass or unit charge or unit magnetic pole) at a given point in the field
  supertype:  #intensity_level__intensitylevel__intensity__strength  the amount of energy transmitted (as by acoustic or electromagnetic radiation); "he adjusted the intensity of the sound"; "they measured the station's signal strength"
  subtype:  #magnetic_field_strength__magnetic_intensity__magnetic_induction__magnetic_flux_density  the amount of magnetic flux in a unit area perpendicular to the direction of magnetic flow
  subtype:  #field_strength_unit  an electromagnetic unit of magnetic intensity
     subtype:  #gamma.field_strength_unit  a unit of magnetic field strength equal to one-hundred-thousandth of an oersted
     subtype:  #oersted  the magnetic field strength 1 cm from a unit magnetic pole

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