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Resistance: find the equivalent resistance.

  • Thread starter LostShadow
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  • #1
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Homework Statement



resistance.png


Homework Equations



Resistors in series (in a straight line) add. Like R + R = 2R.

And if in parallel, they inversely add.

1/R_total = 1/R1 + 1/R2

So, I have no idea how to "simplify" this.

Basically trying to find the total resistance.

Thanks.
 

Answers and Replies

  • #2
gneill
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Start by identifying resistors which are in series or parallel. What do you find?
 
  • #3
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Resistors in series or parallel that could be in series or parallel with others resistors that could be in series and parallel...
 
  • #4
haruspex
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Start with some pair of resistors that you can analyse without having to consider a third. That could be two in series with no other resistor connected to their junction, or two directly in parallel - i.e. that make a direct connection to each other at each end. Having found such pair, figure out what the effective resistance of the pair is and replace the pair by a single equivalent resistor. Repeat.
 
  • #5
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1) if R=1ohm

R eq= 2.5ohms

relation: (2R+R)x(2R+R) / (2R+R) + (2R+R) + R

2) inverse add last two R, answer will series add with the R in the line, u will eventually see only two R in parallel, then inverse add these last two to get your answer.
 

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