NEET 2018 Physics Viscosity MCQ Question
A small sphere of radius 'r' falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity, is proportional to
r³
r²
r⁵
r⁴
Correct Answer
Detailed Explanation
The rate of heat production is proportional to the cube of the radius because it depends on the volume and surface area of the sphere.
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