COMEDK · Physics · 12. Thermal Properties of Matter
The coefficient of thermal conductivity of copper is 9 times that of steel. In the composite cylindrical bar shown in the figure, what will be the temperature at the junction of copper and steel?
- A \(75^{\circ} \mathrm{C}\)
- B \(67^{\circ} \mathrm{C}\)
- C \(25^{\circ} \mathrm{C}\)
- D \(33^{\circ} \mathrm{C}\)
Answer & Solution
Correct Answer
(A) \(75^{\circ} \mathrm{C}\)
Step-by-step Solution
Detailed explanation
The given situation is shown below Thermal conductivity of copper \(=9 \times\) thermal conductivity of steel \[ K_{c}=9 K_{s} \] Since, both bar are connected in series, hence heat current along the bar will be same. i. e…
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