Millmans Theorem

This circuit demonstrates Millmans Theorem. This circuit has 3 parallel voltage sources with resistors drawing current. This circuit can have a one voltage source and series resistor equivalent. If the 3 ohm output resistor were an open circuit the output voltage would be 2.5 V. If you shorted the power supplies and looked into the open output with an ohm meter the resistance would be 3 Ohms. The equivalent circuit has a voltage source of 2.5 Volts and a series resistance of 3 ohms. The 3 ohm load resistor has the same 1.25 Volt and 417 mA output as the original circuit. Also If the sum of the 3 parallel circuits equal the total current at the output. 729 mA or 0.729 Amps + 1.13 Amps + (- 1.44 Amps )equal 417 mA or 0.417 Amps.