Equivalent resistance in a complex circuit

Homework Statement

1. In the circuit shown, R1 = 0.810 Ω, R2 = 8.10 Ω, R3 = 81.0 Ω, and R0 = 810 Ω.
See attachment

1. Calculate the equivalent resistance of the circuit when a 7.70 V power supply is connected between points A and C.
Calculate the current through R0 and R1

Homework Equations

Series: resistances sum
Parallel: 1/Req=1/R1+1/R2...

The Attempt at a Solution

Okay so I'm not really understanding circuits well. From what I would gather R3 and R0 would be in series, but I'm just really confused about R1 and R2. And I'm not even 100% sure if R3 and R0 are actually in series since it branches off to D between them as well..

Attachments

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You're correct that R3 and R0 are in series. Now combine them and notice what happens with the circuit.

Now, why doesn't it matter that D is in between them? Because in this particular scenario, the D branch is an open circuit, so there will be no current flow in it, so you can treat the circuit as if thst branch isn't even there.

So if the B branch is also an open circuit, then...

NascentOxygen
Staff Emeritus