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Finding the Equivalent Resistance

  • Thread starter B18
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  • #1
B18
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1. Homework Statement
Find the equivalent resistance

Homework Equations


Is=I1=I2=...
Vs=V1+V2+...
Rs=R1+R2+...
Ip=I1+I2+...
Vp=V1=V2=...
1/Rp=(1/R1)+(1/R2)+...

The Attempt at a Solution


Sorry the picture is sideways! Is this the correct method for finding the equivalent resistance? The part that confuses me is R5 and R4. Just wasn't sure if they were in series.Thanks for any help you can provide!![/B]
View attachment 75652
 

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Answers and Replies

  • #2
Orodruin
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The part that confuses me is R5 and R4. Just wasn't sure if they were in series.
They are not in series, nor are they in parallel. However, there is another set of resistors in that step which are in parallel.
 
  • #3
B18
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They are not in series, nor are they in parallel. However, there is another set of resistors in that step which are in parallel.
Would the 60 Ohm resistor be in parallel with R5? and then the equivalent resistor for the 60 Ohm and R5 resistors would be in series with R4?
 
  • #4
B18
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Ok i tried that way. Got an equivalent resistance of 54 Ohms. I don't see any spots that confuse me. Did I do this correctly?
 

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  • #5
B18
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Is anyone able to confirm the equivalent resistance as being 54 Ohms?
 
  • #6
gneill
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Is anyone able to confirm the equivalent resistance as being 54 Ohms?
Sorry, we cannot simply confirm answers without seeing the calculation details. Looking over the thread I see more questions than calculations. If you present your calculations and reasoning then we will be happy to comment on the method and results.

Orodruin pointed out a flaw in your first attempt, and it sounds like you've corrected it and proceeded correctly. Can you show those calculations?
 
  • #7
B18
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I redid the circuit simplification. These are all the calculations I can give. The resistance values of R1,R2,R3,R4,R5 are givens. and the top left circuit is the starting point. I am just trying to confirm the equivalent resistance of that circuit. Thank you for helping me to this point.
 

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  • #8
gneill
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I redid the circuit simplification. These are all the calculations I can give. The resistance values of R1,R2,R3,R4,R5 are givens. and the top left circuit is the starting point. I am just trying to confirm the equivalent resistance of that circuit.
image1.JPG


Looks good! Nicely presented, too.
 
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  • #9
B18
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Thank you for your help!
 

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