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I1-43: THERMOCOUPLE 7 years 10 months ago #1274

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ID Code: I1-43
Purpose: Demonstrate that dissimilar metals in contact generate a voltage which varies with temperature.
Description: A copper wire and an iron wire are wound together at one end and inserted into either boiling water or ice water. The other ends of the wires are connected to a digital voltmeter. The copper/iron thermocouple generates a voltage, but two copper wires in the same configuration will not.
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