- #1
Barclay
- 208
- 1
Homework Statement
A student investigates how the resistance of a thermistor varies with temperature.
Student immerses a thermistor into a 50 degrees Celsius beaker of water and measures the resistance on an ohmmeter as the water cools. Student adds ice to achieve lower temperatures.
Q1. The water was allowed to cool down slowly during the experiment. How did this improve accuracy of the results?
Q2. The graph of the results produces a downward slope.
Explain
Homework Equations
V = I R
The Attempt at a Solution
A1. If the water is cooled to fast then the electrons that were released into the electron cloud will not be able to return to their bound state fast enough (so they will be in limbo) so the resistance will be recorded artificially low because electrons are still free.
A2. Is this a negative correlation? I heard that from someone but not sure what it means.
Thank you