1. Use a variable resistor to increase or decrease the resistance of the circuit in small, equal steps. Changing the resistance changes the amount of current flowing through the circuit.
2. For each change in resistance take a reading from the ammeter and the voltmeter.
3. Reverse the direction of the electricity flow by switching the wires connected to the power pack. Then repeat steps 1 and 2 to collect negative data.
Thermistor:
- Need to measure resistance and temperature.
- Use a water bath to very the temperature.
- Use a digital thermometer to measure the temperature.
- Then follow the method above.
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