# Total Resistance in a Circuit

1. Sep 24, 2009

### HEYJOHN

What single, equivalent resistor could replace all of the resistors in this circuit?

Rtot = Ω
2 NO

HELP: If you study the diagram, you will see one pair of resistors which is in parallel. Replace this pair with a single equivalent resistor and re-draw the circuit.

HELP: If you have followed the previous suggestion, you will now see a pair of resistors which is in series. Replace this pair with a single equivalent resistor and re-draw the circuit again.

here is an image of the circuit: https://tycho-s.physics.wisc.edu/cgi/courses/shell/common/showme.pl?courses/phys104/fall09/homework/04/r2/ex1s95p3.gif [Broken]

Req parallel: 1/R1 + 1/R2 = 1/Req

Req series: R1 + R2 =Req

R1=2 R2=5 R3=13 R4=8

I've tried to redraw the circuit where Req= R1 + R2 + [1/(1/R3)+(1/R4)] but that didn't work, any suggestions to which two resistors in the image are parallel to one another to get me started on redrawing the circuit to solve the problem?

Last edited by a moderator: May 4, 2017
2. Sep 24, 2009

### HEYJOHN

Just figured it out, thanks!