Question

Which of the following circular rods, (given radius r and length l) each made of the same material and whose ends are maintained at the same temperature will conduct most heat?(a) r = 2r₀; l = 2l₀(b) r = 2r₀; l = l₀(c) r = r₀; l = 2l₀(d) r = r₀; l = l₀

Answer 1

(b)

Explanation:

In this, dQ is calculated in each case.

As material is same so, K & T is same in all 4 case.

Answer 2

Its answer is (2) as in this heat will be increased by a factor of 4..

Hope it helps u...

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