Current Divider Problem, Can't Solve

Thread Starter


Joined Jul 12, 2011
Hey all, I'm stuck on this current divider problem. It's just killing me, I've been trying to solve it for an hour and a half now. I've combined and uncombined the circuits in about all the ways possible but I just can't get the right answer. Can someone help me out?
Here's the problem setup:

Is: 14.25 mA R1= 71k ohms R2= 21k ohms R3= 4k ohms R4 = 65k ohms R6= 31k ohms R7 = 34k ohms and R8 = 76k ohms



Joined Mar 6, 2009
Start by lumping R3,R4,R6,R7 & R8 together as a single value.

This value is 68.834k

R1 & R5 play no part in the current distribution.

So I2=14.25mA*68.834/(21+68.834)=10.919mA.

Now find the current in R4 since you know I2.

You then look at the current division of the current in R4 between the parallel combination R3||(R6,R7 & R8 combined) to deduce I3.

And so on ....