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Efficiency Test Using the alligator clips provided in the lab kit, connect the 50 resistor to the DC machine that is NOT connected to the power supply. Adjust the output of the supply until the output voltage is 4V. Record the output current of the supply. Also, use the multimeter to measure the output voltage of the DC machine connected to the load resistor. Calculate the input power (i.e., power from the supply), output power (i.e., the power absorbed by the resistor), and corresponding efficiency. Repeat for supply voltages of 8V and 12V. Output A Output V w/ 5 ohm resistor 4V = .8A -1.6V 8V = 1.35A -3.8V 12V= 1.88A -6.2V

Fig: 1