Please explain the q

Please explain the q Time Time Time 4. The figure shows a system of two concentric spheres of radii r, and r2 and kept at temperatures T I and T2 respectively. The radial rate of flow of heat in a substance .2 between the two concentric spheres is proportional to (l) r,) 6.1 U (4) log -Z (3) qr2

Dear Student,

The option 1 is correct.

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