Physics · JEE | MECHANICAL PROPERTIES OF FLUIDS
हिन्दीGiven below are two statements: Statement I: The viscosity of liquids decreases with an increase in temperature, whereas the viscosity of gases increases with an increase in temperature. Statement II: The terminal velocity of a small spherical body falling through a viscous medium is directly proportional to the square of its radius. In the light of the above statements, choose the most appropriate answer from the options given below:
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Correct answer · Option A
Both Statement I and Statement II are correct.
Explanation
Both statements describe standard established properties: liquid viscosity decreases with heat while gas viscosity increases, and terminal velocity formula \( v_t = \frac{2a^2(\rho-\sigma)g}{9\eta} \) shows quadratic dependence on radius.