NEET UG 2018 · Physics · Question 42
NEET 2018 Physics, question 42
Question 42 of the NEET 2018 paper (code AA) is a Physics question from Mechanical Properties of Fluids. Its idea, Power Dissipation by Viscous Drag, was asked only this once in NEET 2017–2026. The CBSE official answer key gives option 1.
Updated 2026-10-08
Q42 · Physics
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
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Official answer: option 1 · CBSE official answer key
Same idea
The only question on Power Dissipation by Viscous Drag
No other NEET paper from 2017–2026 tested this exact idea.
Power Dissipation by Viscous Drag: every question and how it was framed
The chapter
Mechanical Properties of Fluids in ten years of NEET
15 questions from 2017–2026, asked in 10 of 10 papers, about 1.4 a paper. Fluid Viscosity alone had 4.