Question

A Fahrenheit thermometer reads ${113}^0$F while a faulty Celsius thermometer reads ${44}^0$C The correction to be applied to the Celsius thermometer is.

• A. $-1^0$C
• B. $+1^0$C
• C. $+2^0$C
• D. $-2^0$F

Answer 1

The correct option is A $-1^0$C

Using Relation $F=\frac{9}{5}C+32$

Correct value of Celsius $=\frac{5}{9}(F-32)=\frac{5}{9}\times 81={45}^{0}C$

$Error=45-44=1^{0}C$

$\Rightarrow Correction=-Error=-1^{0}C$

Therefore, A is correct option.