Which elements are in series and which are in parallel in Figure P1.39? b. What is the relationship between i_a and i_e? c. Given that i_b = 8 A, and i_c = -2 A, determine the values of i_a and i_d. Solution Elements are in series-A-E,C-D... A,E and C,D is parallel with B ia ie are equall,but opposite in magnitude(ie) ia=-ie ia+ic=ib; ia=ib-ic= 8-(-2)=10A where ic=-id so id=-(-2)=2A.