Physics · May / June 2022 · Paper 41 · Question 4
0625
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The question as text
A thermocouple is a device that is used as a thermometer.
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4(a)(i)[4]
two / three wires of at least two different metals
one junction in sulfur
the other junction in ice-water mixture / at room temperature and one of the wires must be from the first junction labelled voltmeter / voltmeter symbol correctly connected
4(a)(ii)[2]
measure e.m.f.
how to find temperature from e.m.f. (e.g. use calibration graph or calculation or table)
4(b)[1]
measures high temperatures / wires do not melt / rapid response / robust / small heat capacity / electrical output / (can be) remote from observer / direct input to computer
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