“ dot convention” If,i,(entering two coils) produce flux linkages which are increase each other, then the two terminals(l, 2 or 1 2) are defined as“ dot terminals”(“ same name terminals”) i↑ p, 12 2 2“dot convention” L2  2 i 1 i L1  If i1 ,i2 (entering two coils) produce flux linkages which are increase each other, then the two terminals(1, 2 or 1’ , 2 ’ ) are defined as “dot terminals”(“same name terminals”) . 1 i 11  21 L1 L2   2 i 12  22 1 1' 2 2