A fluid is termed as the Newtonian fluid, when the shear stress is _________________ the velocity gradient ?
Correct answer: C. Directly proportional to
- A. Independent of
- B. Inversely proportional to
- C. Directly proportional to
- D. None of these
Explanation
For a Newtonian fluid, shear stress follows Newton's law of viscosity, τ = μ(du/dy), so it is directly proportional to the velocity gradient at constant viscosity. Non-Newtonian fluids do not maintain this linear relationship.
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