Voltage is the pressure that causes the electrons want to flow. When the electrons move, it is called current. Resistance is the restriction to current's flow. More voltage pressure will result in more current flow for a given resistance restriction. Flowing current causes magnetic fields.
Magnetic force is proportional to the current flow, ignoring non-ideal effects.
Magnetic force causes valve spool and electric motor movement. Just as forcing fluid through a restriction generates heat, forcing current through resistance also generates heat. The heat is measured in wattage . Inductance is the property of a coil resisting changes in current flow. Capacitance is the property of a capacitor resisting changes in voltage.