FTP, identify this quantity that is a measure of the strength of a magnet or a current-carrying coil.
An electron bears the orbital version of this quantity, whose value is equal to the equivalent current times the orbital area.  Measured in SI units of Ampere meters squared, it is measured by the maximum torque divided by the field strength in the Kennelly approach, while in the Sommerfeld approach it is measured by the maximum torque divided by the strength of the magnetic field.  FTP, identify this quantity that is a measure of the strength of a magnet or a current-carrying coil.
An electron bears the orbital version of this quantity, whose value is equal to the equivalent current times the orbital area.  
magnetic moment