Figure 0.2, Circuit for Example 0.1. There is a battery on the left. It is labeled E = 48 volts. The negative connects to the common line. The positive connects to one end of a resistor labeled R1 = 3 k ohms. The other end of the resistor connects to one end of another resistor labeled R2 = 1 k ohm. The other end of R2 connects to the common line. The junction of R1 and R2 goes to one end of R3 = 500 ohms. The other end of R3 connects to the positive output terminal. The negative output terminal connects to the common line. This completes the verbal description.
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