Figure 1.12. On the left an ideal voltage source is labeled 7.87 v. Its bottom end is connected to the bottom line of the circuit. The top end connects to the left end of a resistor which is labeled with a question mark. The right end of this resistor connects to the upper output terminal. The lower output terminal is connected to the bottom line. There is a resistor connected across the output terminals. It is labeled R L = 100 ohms. There is a label indicating that the voltage between the two output terminals is 5.20 volts. End verbal description.