Q. If the ratio of coefficient of thermal conductivity of silver and copper is 10 : 9, then the ratio of the lengths upto which wax will melt in Ingen Hauz experiment will be
A) 6 : 10
B) $\sqrt{10}\ :3$
C) 100 : 81
D) 81 : 100
Explanation
(b) $K_{1}{:K}_{2} = l_{1}^{2}:l_{2}^{2} \Rightarrow \frac{l_{1}}{l_{2}} = \sqrt{\frac{K_{1}}{K_{2}}} = \sqrt{\frac{10}{9}} = \frac{\sqrt{10}}{3}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.