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^(@)` C and `60^(@)` C and that for the other rod is 150 and `110^(@)` 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

Correct Answer - C
Rate of heat transfer,
`Q_(1)/t = (KA(90-60))/0.6 = 50KA`
and `Q_(2)/t = (KA(150-110))/0.8 = 50KA`