Upon completion of this activity students will be able to describe and use a thermocouple as a device to measure temperature. Ammeter measuring in micro ampere, or a galvanometer. Copper wire 3. Iron wire 4. Ring stand, ring, wire gauze 7.
Students construct the device according to the following diagram.
Take a baseline reading of the current flow through the device at room temperature. Take a reading at the boiling point temperature of water. Plot the two on a graph of temperature vs. current. Place the junction into a beaker of ice water. Place the junction into the flame of the Bunsen burner.