Final answer:
The major difference between a bimetallic stemmed thermometer and a thermistor is the sensing mechanism. A bimetallic thermometer uses a two-layered strip of different metals that expands or contracts, while a thermistor measures temperature through the resistance of a semiconductor crystal.
Step-by-step explanation:
The major difference between a bimetallic stemmed thermometer and a thermistor is the sensing mechanism.
A bimetallic stemmed thermometer uses a two-layered strip made of different metals that expand or contract at different rates when heated or cooled. This causes the strip to coil or uncoil, which is then calibrated to indicate temperature changes.
On the other hand, a thermistor is a semiconductor crystal with a strong temperature dependence. Its resistance is measured to obtain temperature readings, making it a more accurate and automated measurement method.
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