# HELP Solve for R and I

Discussion in 'General Electronics Chat' started by tjjam2003, Apr 5, 2006.

1. ### tjjam2003 Thread Starter Member

Apr 5, 2006
22
0
In a Series-Parallel circuit, how do you find the resistance and the current if only the voltage is given? 5 resistors in series and 1 resistor in parallel.

R1= 3 ohm Voltage= 3V Current 1A
R2= 5 ohm Voltage =1.65 current 0.33A

R3= ??? voltage= 4 volts (parallel)

R4= 4 ohm Voltage 1.32 Current 0.33
R5= 1 ohm voltage 1 volt current 1A
R6=3ohm voltage 0.99 current 0.33

2. ### hgmjr Moderator

Jan 28, 2005
9,030
214
Your problem would be clearer and easier to solve if you could provide a sketch of the circuit.

hgmjr

3. ### david mendes New Member

Mar 23, 2006
6
0
Your values seem uncoherent... the only possibility to underestand the problem is by designing the circuit...
Dd.

4. ### JoeJester AAC Fanatic!

Apr 26, 2005
3,394
1,212
With your detail, I don't see your initial standard ... 5 resistors in series and 1 in parallel.

I can see three branches in parallel, one single resistor, on with two in series, and one with three in series.

If there is an associated drawing, post it.

5. ### windoze killa AAC Fanatic!

Feb 23, 2006
605
24
I also responded to this somewhere else. Your values do not make sense.

6. ### n9xv Senior Member

Jan 18, 2005
329
1
Draw it. Use paint/Paintbrush, zip it, post it.

7. ### thingmaker3 Retired Moderator

May 16, 2005
5,072
6

You don't.

<!--QuoteBegin-tjjam2003
@Apr 5 2006, 08:13 AM
5 resistors in series and 1 resistor in parallel.

R1= 3 ohm Voltage= 3V Current 1A
R2= 5 ohm Voltage =1.65 current 0.33A

R3= ??? voltage= 4 volts (parallel)

R4= 4 ohm Voltage 1.32 Current 0.33
R5= 1 ohm voltage 1 volt current 1A
R6=3ohm voltage 0.99 current 0.33
[post=15853]Quoted post[/post]​
[/quote]

Okay... R1 and R5 are in series with each other, yes? 1A each and 4v across the two of them.

R2, R4, and R6 are in series as well... 1/3 amp each and about 4V across the three of them.

If R3 is also in parallel, then there is no way to know current or resistance, save that R>0.

If the above is wrong, then the numbers given are also wrong.

8. ### Mazaag Senior Member

Oct 23, 2004
255
0
√ Draw It , Paint It , View It, Change It, Print It, Zip It , Post - Upload It √