PIRA 5D20.50 - Temperature and Resistivity: Thermistor/Semiconductor in Liquid
Nitrogen.
Photo Shows the Demonstration Used by the University of Texas at
Austin.
Instructions / Notes:
- Connect the thermistor in series with an ammeter and hobby
battery.
- Warm the thermistor via body heat by holding it between two fingers. Observe the change in current due to the increase in temperature.
- Fill the square styrofoam container with liquid nitrogen.
- Submerge the thermistor in liquid nitrogen. Observe the change in current due to the decrease in temperature.
- When the demo is not in use, DISCONNECT the negative wire from the battery holder, as pictured below.
Demo Staff:
- The thermistor in LN2 demonstration has its own dedicated ring stand - and - square styrofoam container.
- Unfortunately, the above items don't fit in the storage box that contains the micro-ammeter, a 1.5 volt battery holder and the thermistor .
- This dedicated ring stand fits the micro-ammeter.
Last Updated 2023 - University of Texas at Austin Physics Dept. -
All Rights Reserved.