Question

The length of the two rods made up of the same metal and having the same area of cross-section are 0.6 m and 0.8 m respectively. The temperature between the ends of first rod is $90^{o}C$ and $60^{o}C$and that for the other rod is 150 and $110^{o}C$. For which rod the rate of conduction will be greater

• A. First
• B. Second
• C. Same for both
• D. None of the above

Answer 1

Answer: (C)

Same for both

Answer 2

$\frac{Q_{1}}{t} = \frac{KA(90 - 60)}{0.6} = 50\mspace{6mu} KA$

and $\frac{Q_{2}}{t} = \frac{KA(150 - 110)}{0.8} = 50\mspace{6mu} KA$