phy1020.DVI

6 V

3 V

R 1 =2 ohms

R 2 =5 ohms

R 3 =4 ohms

R 4 =7 ohms

R 5 =10 ohms

I 1

I 3

I 2

Figure 23.1: Example circuit for analysis using Kirchhoff’s rules. As shown by the analysis, the actual
direction of currentI 2 will turn out to be opposite the direction shown here.

R

R

V

V

a

a

a

a

I

I

b

b

b

b

+V

-V

+IR

-IR

Figure 23.2: Terms for use in Kirchhoff’s voltage rule. The evaluation direction is always fromatob.