A reactor comprising an annular iron core constituting {TAIL ~ a closed magnetic path} and a conductor wound on {HEAD ~ the iron core} 
A reactor comprising an annular iron core constituting { TAIL ~ a closed magnetic path } and a conductor wound on { HEAD ~ the iron core }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD