Parallel Series Help

Discussion in 'General Electronics Chat' started by f74bat, Nov 26, 2008.

Nov 26, 2008
13
0
Not sure how to combine series and parallel curcuits...

Part 1:
A number of resistors of values R1 = 19.0 Ω, R2 = 82.0 Ω, and R3 = 14.0 Ω are connected as shown in the figure.

What is the resistance between points A and B?

Part 2:
If VAB = 115.0 V, what is the current flowing between points C and D through R2 ?​

2. mik3 Senior Member

Feb 4, 2008
4,846
63
Start form the right side of the circuit and make parallel/series combination of resistors until you will be left with a single resistors between points A and B. This will be the equivalent resistance of the network.

For the second part, find the equivalent resistance between points C and D with the same way as before (you will already have the calculations) and then find the current through R1-Rcd(equivalent)-R1 by manipulating them as series resistors.

Nov 26, 2008
13
0
Do include R2 in the first series? And when i do the first parallel is it 8(R1)+(2/R2)+R3? Do i add all the receptors off to the side in the parallel?

4. Søren Senior Member

Sep 2, 2006
472
28
Hi,

This is an easy way of solving it:

I think you should be able to do the numbers yourself now.