MP Board · Class 11 · Physics · Thermal Properties of MatterWhat is the SI unit of coefficient of thermal conductivity ($K$)?
Step-by-Step Solution
The coefficient of thermal conductivity is defined as $K = \frac{Q \cdot d}{A \cdot \Delta T \cdot t}$. Substituting SI units: $\frac{\text{J} \cdot \text{m}}{\text{m}^2 \cdot \text{K} \cdot \text{s}} = \text{W m}^{-1} \text{K}^{-1}$. Hence, option A is correct.
Detailed Options Breakdown
Option : $\text{W m}^{-1} \text{K}^{-1}$ (Correct Answer)
Correct choice. Refer to the step-by-step verified solution guidelines above for details.
Option 1: $\text{J m K}^{-1}$
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Thermal Properties of Matter.
Option 2: $\text{W m K}^{-1}$
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Thermal Properties of Matter.
Option 3: $\text{J m}^{-1} \text{K}$
Incorrect choice. This distractor represents a common misunderstanding of the core principles of Thermal Properties of Matter.
💡 Study Guide: This question tests core syllabus concepts from Thermal Properties of Matter. For formulas, key summaries, and mock exam reference guides, read the full Thermal Properties of Matter Revision Notes.