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# Lower fixed point is marked at 10°C and upper fixed point is marked as 130°C. What will be the reading on this thermometer when it is placed in a liquid which is actually at 40°C? - Physics

Short Note
On a faulty thermometer, a lower fixed point is marked at 10°C and upper fixed point is marked as 130°C. What will be the reading on this thermometer when it is placed in a liquid which is actually at 40°C?
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#### Solution

Lower fixed point = 10°C
Upper fixed point =130°C
Range of thermometer= 130°C - 10°C
= 120°C
No of divisions = 100
So least count = 120/100 = 1.2°C
On actual thermometer 40°C would have 40 divisions
So, on this thermometer, it would show
= 40 x LC = 48°C

Concept: Graphs Showing Variation of Volume and Density of Water with Temperature in the 0 to 10°C Range
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#### APPEARS IN

Frank Class 9 Physics ICSE
Chapter 5 Heat
Exercise | Q 83 | Page 232
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