Physics · Heat Transfer
Two thin metallic spherical shells of radii r1 and r2 (r1 < r2) are placed concentrically. A material of thermal conductivity K is filled in the space between the shells. The inner shell is maintained at temperature θ1 and the outer shell at temperature θ2 (θ1 < θ2). The rate at which heat flows radially through the material is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 14π K r1 r2 (θ2 - θ1)r2 - r1✓
- 2π K r1 r2 (θ2 - θ1)r2 - r1
- 3K (θ2 - θ1) (r2 - r1)4π r1 r2
- 4K (θ2 - θ1)r2 - r1
Correct answer
4π K r1 r2 (θ2 - θ1)r2 - r1
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