AP EAMCET · PHYSICS · Thermal Properties of Matter
Three conducting rods \(\mathrm{AB}, \mathrm{BC}\) and \(\mathrm{BD}\) made of same material and same cross section are arranged as shown in the figure. Temperatures at the points A, D and C are maintained at \(20^{\circ} \mathrm{C}, 90^{\circ} \mathrm{C}\) and \(0^{\circ} \mathrm{C}\) respectively. The ratio of lengths of \(\mathrm{BD}\) to \(\mathrm{BC}\) when there is no heat flow in \(A B\), is
- A \(\frac{2}{9}\)
- B \(\frac{7}{2}\)
- C \(\frac{2}{7}\)
- D \(\frac{9}{2}\)
Answer & Solution
Correct Answer
(B) \(\frac{7}{2}\)
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