Example 4 . 8 - 1 Mesh Equations
Consider the circuit shown in Figure 4.8-1. Find the value of the resistance, R.
Solution
Figure 4.8-2a shows the circuit from Figure 4.8-1 after replacing the ammeter by an equivalent short circuit and
labeling the current measured by the ammeter. This circuit can be analyzed using mesh equations or using node
equations. To decide which will be easier, we first count the nodes and meshes. This circuit has five nodes. Selecting a
FIGURE 4.8-1 The circuit considered in Example 4.8-1.
FIGURE 4.8-2 (a) The
circuit from Figure 4.8-
1 after replacing the
ammeter by a short
circuit. (b) The circuit
after labeling the
meshes.