a level physics doubt

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Thread starter 4 years ago
#1
A resistance thermometer and a thermocouple thermometer are both used at the same
time to measure the temperature of a water bath.

Explain why, although both thermometers have been calibrated correctly and are at
equilibrium, they may record different temperatures. (2)

- the ans is that

temp scale calibrated assuming linear change of property with temperature
neither property varies linearly with temp

my doubt:

How would i know tht they assumed they vary linearly with temp
The q said it is calibrated correctly
If it is calibrated correctly tht does mean tht they look linearity in consideration right...
If they didn't thn how is the calibration correct

Yeah bt thts wht calibration is right
If i have 100 degree water
I will calibrate both my thermometer to give a value of 100
If both give different values thn how will i knw whts the actual temp

I know they don't vary linearly in practical life
I know they will give different values in same temperatures according to their respective linearity
Bt thts whr calibration comes in right

U calibrate a thermometer according to its linearity so tht it shows the correct temp according to their respective linearity
Tht is why u actually calibrate right
Otherwise whts the point of calibrating
0
4 years ago
#2
Where'd you get this question from?
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Thread starter 4 years ago
#3
(Original post by Goimpress)
Where'd you get this question from?
its a 9702 past paper question. dont know thw exact paper number cuz i took it from questions by topic from physics and maths tutor
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