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BITSAT 2024Paper 1
Exam
BITSAT
Year
2024
Paper
Paper 1
Subject
Physics
Chapter
Thermodynamics

BITSAT 2024 · Paper 1 · Physics · Thermodynamics

On celcius scale the temperature of body increases by 40^ ^ C . The...

On celcius scale the temperature of body increases by 40∘C40^{{}^{\circ}} \mathrm{C}. The increase in temperature on Fahrenheit scale is:

Options

  1. A70∘F70^{{}^{\circ}} \mathrm{F}
  2. B68∘F68^{{}^{\circ}} \mathrm{F}
  3. C72∘F72^{{}^{\circ}} \mathrm{F}
  4. D75∘F75^{{}^{\circ}} \mathrm{F}

Correct answer

C. 72∘F72^{{}^{\circ}} \mathrm{F}

Step-by-step solution

Since F−329=C5⇒ΔC=59ΔF⇒40=59ΔF⇒ΔF=72∘F\frac{F-32}{9}=\frac{C}{5}\Rightarrow \Delta \mathrm{C}=\frac{5}{9} \Delta \mathrm{ F}\Rightarrow 40=\frac{5}{9} \Delta \mathrm{ F} \Rightarrow \Delta \mathrm{ F}=72^{{}^{\circ}} \mathrm{F}
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