The circuit in Figure 4-4 has three equal resistors. If the voltmeter reads +8.0 V, find 𝑉𝑆.
In the circuit shown in Figure 4-3, assume you found that 𝐼𝑇 was the same as the current in 𝑅3 and 𝑅4 .

Show the application of Kirchhoff's Current Law to the junction of 𝑅2 and 𝑅4 in the circuit shown in Figure 4-3.

As a check on your solution of the circuit in Figure 4-3, apply Kirchhoff's Voltage Law to each of two separate paths around the circuit.

What are the possible problems?
How would you isolate the specific problem using only a voltmeter?
b)
Figure 4-4
a)