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I1-43. Thermocouple

Purpose

To demonstrate that dissimilar metals in contact generate a voltage which varies with temperature.

Equipment

Two copper wires, iron wire, beaker of ice water, beaker of hot wire on hot plate, digital voltmeter with clip leads.

Setup Time

5 minutes.

Images

I1-43

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.

I. Thermodynamics

I. Thermodynamics

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