Calling all electrical engineers!!

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Here's a better look at the circuit in question.

bump?

>>313311
by symmetry the current in the top resistor is obviously 0 (you can flip it 180° and get the same circuit but with the current going the other way so it must be 0) so it's a virtual open circuit.

2R||2R || R = R || R = 1/2 R

>>313327
What about the one in the bottom?

>>313340

What? It's effectively 3 parallel strings, 2 with 2 resistors, and 1 with 1 resistor.

The one bridging the 2 pairs in the middle does nothing. You can cut it out or short it.

>>313346
I don't understand the flipping part of your answer.

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>>313349
I=-I
2I=0
I=0

File: I literally know high schoolers who can solve this shit.png (42KB, 260x296px) Image search: [Google]

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>>313311
>>313327

This will help.
https://en.wikipedia.org/wiki/Y-%CE%94_transform

>>313395
Fuck off.

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Here anon

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Also, this is what >>313327 was talking about