NEET2018Physics-Fluid Mechanics
NEET 2018 Physics Viscosity MCQ Question
Type: MCQ-conceptual-Medium-Class 11
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
A
r³
B
r²
C
r⁵
D
r⁴
Correct Answer
Option C
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.
Found an issue with this question?