jee_main_2025_28_jan_morning - Mechanical Properties of Fluids Topics

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QUESTION #2 Viscosity and Terminal Velocity
In the experiment for measurement of viscosity eta of given liquid with a ball having radius R , consider following statements. A. Graph between terminal velocity V and R will be a parabola B. The terminal velocities of different diameter balls are constant for a given liquid. C. Measurement of terminal velocity is dependent on the temperature. D. This experiment can be utilized to assess the density of a given liquid. E. If balls are dropped with some initial speed, the value of eta will change. Choose the correct answer from the options given below:
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QUESTION #3 Surface Tension and Viscosity
Consider following statements: A. Surface tension arises due to extra energy of the molecules at the interior as compared to the molecules at the surface, of a liquid. B. As the temperature of liquid rises, the coefficient of viscosity increases. C. As the temperature of gas increases, the coefficient of viscosity increases. D. The onset of turbulence is determined by Reynold's number. E. In a steady flow two stream lines never intersect. Choose the correct answer from the options given below:
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