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Thermocouple Thermometers
Thermocouple Thermometers
Thermocouple thermometers also allow us to measure change in temperature, especially high temperatures and those that change rapidly.
Which of the following can be used to measure temperature? Pick all the options you think are correct.
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Which of the following methods of measuring temperature involves attaching two wires?
This is a very simple thermocouple thermometer.
The two wires are connected in a circuit.
The component MV is a voltmeter. It measures the potential difference across the two wires.
The potential difference changes as the temperature changes. This allows us to measure the temperature change, by looking at the change in potential difference.
A thermocouple consists of two wires. When they are heated, what is created?
In a thermocouple, do the wires attached to each other need to be the same or different?
A potential difference is created when you heat the two wires at the same point, how does this allow us to measure the temperature?
A thermocouple consists of two different wires joined together. When the join is heated, a potential difference is created due to the different characteristics of the wires. This allows us to measure the temperature change by measuring the change in potential difference.
Why might be sometimes use a thermocouple instead of for example a mercury thermometer?
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So thermocouples be used to measure extremely high temperatures. Why?
Thermocouples can be used to measure rapid changes of temperature. Why?
The metal wires in a thermocouple are able to withstand high temperatures because they have high melting points. They are also able to measure rapidly changing temperatures because the potential difference changes instantly.