{HEAD ~ The south pole} on {TAIL ~ tooth} 1 is allowed to decay, the diminution occurring at a rate depending on the hysteresis of the rotor material 
on
{ HEAD ~ The south pole } on { TAIL ~ tooth } 1 is allowed to decay , the diminution occurring at a rate depending on the hysteresis of the rotor material
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH