Which elements are in series and which are in parallel in Fi

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

i_a i_e are equall,but opposite in magnitude(ie) i_a=-i_e

ia+ic=ib;   

ia=ib-ic= 8-(-2)=10A  

where ic=-id so id=-(-2)=2A