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Question

A faulty thermometer has 90.5C and 0.5C as upper and lower fixed points respectively. What is the correct temperature if this faulty thermometer reads 15.5C

A
16.67C
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B
16C
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C
15C
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D
15.5C
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Solution

The correct option is B 16.67C
If a thermometer is wrong calibrated then,
If X the temperature reading on the faulty thermometer scale then,
t=(XLFP)(UFPLFP)×100 where, t=actual reading.

So, UFP=90.5oC, LFP=0.5oC for a faulty reading of X=15.5C the actual reading can be found by using above formula is =16.67C

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