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?

Question

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?

Short/Brief Note

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

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Anomalous Expansion of Water

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Q 83 Q 82 Q 84

Chapter 5: Heat - Exercise [Page 232]

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Frank Physics [English] Class 9 ICSE

Chapter 5 Heat
Exercise | Q 83 | Page 232

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