KCET · Physics · Thermal Properties of Matter
A sphere, a cube and a thin circular plate all of same material and same mass initially heated to same high temperature are allowed to cool down under similar conditions. Then, the
- A plate will cool the fastest and cube the slowest
- B sphere will cool the fastest and cube the slowest
- C plate will cool the fastest and sphere the slowest
- D cube will cool the fastest and plate the slowest
Answer & Solution
Correct Answer
(C) plate will cool the fastest and sphere the slowest
Step-by-step Solution
Detailed explanation
The rate of heat transfer is directly proportional to the surface area of body. Since, circular plate has greatest surface area and sphere has least surface area amongst the given three bodies. Hence, when a sphere, a cube and a thin circular plate are allowed to cool down under similar conditions, then the plate will cool the fastest and sphere the slowest.
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