Question

11. Metallic rod of which one of the following dimensious (length and radius respectively) will conduct the mas
heat, when one of the ends is maintained at the same high temperature?
(a) 2 m and 4 cm
(b) 4 m and 8 cm
(c) 6 m and 4 cm (d) 8 m and 8 cm​

Answer 1

22∘C22∘C

26∘C26∘C

25∘C25∘C

24∘C24∘C

Answer :

B

Solution :

Q=KA(Δθt)l⇒θ1−θ2L=θ−θ1t