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→Demonstration
==Demonstration==
==Demonstration==
[[File:E W Circuit Diagram.jpg|400px|thumb|right|Demo Circuit Diagram]]
[[File:E W Circuit Diagram.jpg|400px|thumb|right|Demo Circuit Diagram]]
Set up a breadboard with a 10k potentiometer as a voltage divider using the wiper as the output pin. Connect an LED and a 560Ω resistor in series to the potentiometer's output pin.
Set up a breadboard with a 10kΩ potentiometer as a voltage divider. Connect an LED's anode (the longer leg) to the wiper of the potentiometer. Connect a 560Ω resistor to the cathode (the shorter leg), and connect the other side of the resistor to ground. See the demo circuit diagram to the right for reference.
Part 1: Connect a DC power supply to the input and set it to 10V. Slowly adjust the potentiometer to determine how much voltage and current is needed to turn on the LED. Measure the voltage and current using the digital multimeter.
Part 1: Connect a DC power supply to the input and set it to 10V. Slowly adjust the potentiometer to determine how much voltage and current is needed to turn on the LED. Measure the voltage and current using the digital multimeter.