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Finding equivalent resistance 
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#1
Feb2912, 07:32 PM

P: 4

1. The problem statement, all variables and given/known data
Trying to find equivalent resistance between points a and b.Dont know whether to include resistances r5 and r6. Thanks 2. Relevant equations 3. The attempt at a solution Im not sure what to do with the resistances r5 and r6in the open circuits are they apart of the calculations? i think they are not because nothing should be flowing threw them. without them i got 1.6 ohms for a equivalent resistance 1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution 


#2
Feb2912, 07:45 PM

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Imagine connecting a resistance meter (DVM) between points a and b. That will put a voltage across those 2 points, which will cause currents to flow in some of the resistors. If points c and d are floating during this measurement, will there be any currents through R5 and R6? 


#3
Feb2912, 07:55 PM

P: 4

i want to say that there is no current through those wires, because their not connected to anything making them open circuits?



#4
Feb2912, 10:11 PM

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P: 11,689

Finding equivalent resistance
If no current flows through a component then it will not contribute to the resistance.



#5
Feb2912, 11:09 PM

P: 4

ok, but is there current flowing in r5 and r6



#6
Feb2912, 11:26 PM

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P: 11,689




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