NEET UG 2026 · Physics · Question 12
NEET 2026 Physics, question 12
Question 12 of the NEET 2026 paper (re-exam) is a Physics question from Mechanical Properties of Fluids. Its idea, Terminal Velocity Density Dependence, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 1.
Updated 2026-10-08
Q12 · Physics
In the measurement of viscosity of liquids using terminal velocity experiment, spherical balls of same radius but having different densities are used. The variation of the terminal velocity () with the ratio of density of spherical ball () to density of the liquid (), is best represented by :
The figure, described in words
Options are graphs of v vs sigma/rho with a dotted line at sigma/rho = 1.
- 1[graph: v = 0 up to sigma/rho = 1, then increases linearly]Official answer
- 2[graph: straight line starting from origin (dashed below 1), solid and increasing beyond sigma/rho = 1]
- 3[graph: line with positive intercept at sigma/rho = 1, dashed extension towards origin, increasing linearly]
- 4[graph: v constant (horizontal line) for sigma/rho > 1]
Official answer: option 1 · NTA final answer key
Same idea
The only question on Terminal Velocity Density Dependence
No other NEET paper from 2017–2026 tested this exact idea.
Terminal Velocity Density Dependence: 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.