His early personal research on the relationship of electric circuits to magnetic fields demonstrated quantitatively for the first time that a moving electrical charge produces a magnetic field.
(His early personal research on the relationship of electric circuits to magnetic fields; demonstrated quantitatively; T:for the first time) (a moving electrical charge; produces; a magnetic field)
His early personal research on the relationship of electric circuits to magnetic fields a moving electrical charge
demonstrated quantitatively produces
T:for the first time
a magnetic field