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## Homework Statement

What are the sizes and directions of the currents through

resistors (a) R2 and (b) R3 in Fig. 27-42, where each of the three resistances is 4.0 Ω?

## Homework Equations

ΔV=IR

## The Attempt at a Solution

Equations:

1) ΔVB2 -(i1)R1 -(i2)R2 -ΔVB1=0

5V - 4(i1) - 4(i2) =0

4(i2)=5V -4(i1)

2) ΔVB2 -(i1)R1 -(i3)(R3)=0

10V -4(i1) -4(i3) =0

-4(i3)=-10V + 4(i1)

not sure about this one

3) ΔVB1 -(i2)R2 -(i3)(R3)=0

5V + 4(i2) -4(i3) =0

4) i1=i2 + i3

5V +5V -4(i1) -10V +4(i1)=0

0=0

I'm not really sure what to do here.

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