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QPage 97: Q8: HC Verma: Concepts of Physics - Volume 2 Heat Transfer Page 97: Q8 Solution: A hot liquid is kept in a big room. Its temperature is plotted…

⚠️ Common Exam Traps & Conceptual Pitfalls

Students frequently sketch a linear drop or assume the temperature reaches zero, forgetting Newton's law of cooling: $T(t)=T_{room}+(T_0-T_{room})e^{-kt}$, which approaches the room temperature asymptotically and never crosses it.

A hot liquid is kept in a big room. Its temperature is plotted as a function of time. Which of the following curves may represent the plot?

Multiple Choice Options

  • A a
  • B b
  • C c
  • D d

Step-by-Step Verified Solution

**Answer:** Curve b. **Step-by-Step Explanation:** The temperature of a hot liquid in a room decreases exponentially with time.

All Questions in this Chapter

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