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The figure shows a system of two concentric spheres of radii r_1 and r_2 and kept at temperatures T_1 and T_2 respectively.

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asked Mar 30, 2018 in Physics by shabnam praween (19,050 points) ● 5 ● 6 ● 71

The figure shows a system of two concentric spheres of radii r1 and r2 and kept at temperatures T1 and T2 respectively. The radial rate of flow of heat in a substance between the two concentric sphere is proportional to

(1) r2-r1/r1r2

(2) In (r2/r1)

(3) r1r2/r2-r1

(4) In (r2-r1)

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answered Mar 30, 2018 by santoshjha (25,550 points) ● 4 ● 5 ● 7
selected Mar 30, 2018 by Vikash Kumar
 
Best answer

The correct answer is (3)

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