Therefore, during the second half of the period, current RL passes in {HEAD ~ the direction} indicated by {TAIL ~ the arrow} 19 
Therefore , during the second half of the period , current RL passes in { HEAD ~ the direction } indicated by { TAIL ~ the arrow } 19
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH