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Pi Face

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http://imgur.com/keorO

a) Seems easy enough, the 4 and 6 ohm resistors are in series, and so are the 5 ohm resistor with the 20 V volate source. Did I miss any?

b) Here the question says "Identify pairs" not "all pairs" so I'm not sure if I have to find all of them...aren't there a lot? I think I'm having trouble finding every last parallel pair. This is what I have so far.

1 ohm is in parallel with 2 ohm

4 ohm "" 5 ohm

4 ohm "" 20 V

6 ohm "" 5 ohm

6 ohm "" 20 V

3 ohm "" 5 ohm

3 ohm "" 20 V

1 ohm "" 3 ohm (?)

2 ohm "" 3 ohm (?)

I feel like I have too many or too little pairs...

SIDE QUESTION:

In a circular circuit where all the elements are connected in a single loop, are the elements in series or in parallel?