Figure 2.1, Voltmeter measuring output voltage of Thevenin circuit. On the left is a circle indicating an ideal voltage source. It is labeled V TH. A plus sign near the top connection indicates that it is a source of DC. The bottom terminal of the source goes to the negative connection point of the circuit. The top terminal of the source goes to one end of a resistor. The resistor is labeled R T H. The other end of the resistor goes to the positive connection point of the circuit. On the right a voltmeter is symbolized by another circle. It is labeled V O M. The two terminals of the voltmeter are connected to the negative and positive connection points of the circuit. This completes the verbal description.
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