WBJEE · Physics · Thermal Properties of Matter
In a mercury thermometer, the ice point (lower fixed point) is marked as \(10^{\circ}\) and the steam point (upper fixed point) is marked as \(130^{\circ}\). At \(40^{\circ} \mathrm{C}\) temperature, what will this thermometer read?
- A \(78^{\circ}\)
- B \(66^{\circ}\)
- C \(62^{\circ}\)
- D \(58^{\circ}\)
Answer & Solution
Correct Answer
(D) \(58^{\circ}\)
Step-by-step Solution
Detailed explanation
\(\frac{x-10}{130-10}=\frac{40}{100}\) \[ \begin{array}{r} 100 x-1000=4800 \\ 100 x=5800 \\ x=58^{\circ} \end{array} \]
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