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A faulty thermometer has a stem of uniform cross section marked in mm. If this reads 83 mm instead of 80 mm at LFP and 229 mm instead of 220mm at UFP , find the difference in the length of the mercury thread in both the faulty and correct thermometers at 250 degree celcius. (Take LFP = 0 degree celcius and UFP = 100 degree celcius)

A faulty thermometer has a stem of uniform cross section marked in mm. If this reads 83 mm instead of 80 mm at LFP and 229 mm instead of 220mm at UFP , find the difference in the length of the mercury thread in both the faulty and correct thermometers at 250 degree celcius. (Take LFP = 0 degree celcius and UFP = 100 degree celcius)

Grade:10

1 Answers

Saurabh Koranglekar
askIITians Faculty 10335 Points
3 years ago
Asthe faulty one is showing LFP at 83mm and UFP at 229mmat temperatures 0 degree and 100 degree celciusrespectively.
soat250°Csoat250°C,
UFP shown by it is572.5mm

LFP shown by it is207.5mm
The correct thermometer will show raedings at 250 degree

UFP shown by it at 550mm
LFP shown by it at 220mm


The variations in the readings at 250 degree celcius is
UFP= 22.5mm
LFP = 12.5mm

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