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QPage 97: Q1: HC Verma: Concepts of Physics - Volume 2 Heat Transfer Page 97: Q1 Solution: The thermal conductivity of a rod depends on

⚠️ Common Exam Traps & Conceptual Pitfalls

Students often mistake thermal conductivity ($k$) for a size‑dependent quantity and pick length or cross‑section area, but $k$ is an intrinsic material property; geometry enters only in the heat‑transfer equation $Q = kA\Delta T/L$, not in the definition of $k$.

The thermal conductivity of a rod depends on

Multiple Choice Options

  • A length
  • B mass
  • C area of cross section
  • D material of the rod

Step-by-Step Verified Solution

**Answer:** (d) material of the rod. **Step-by-Step Explanation:** Thermal conductivity is a property of the material.

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