Na=300,Ia=1.5A,Nb=600, Ib=4A,Nc=600,Ic=3A Let us assume direction of flux in upward direction be +ve and downward direction be -ve For Coil A, MMFa=NaIa=300×1.5=450‌AT(+) For coil B, MMFb=NbIb=600×4=2400‌AT(+) For coil C,MMFc=NcIc=600×3=1800‌AT(−) Net MMF=450+2400−1800=1050‌AT Note: The direction of flux for coil a and coil b are in same direction and in opposite direction for coil c.