Question

In the experiment for measurement of viscosity $\eta$ of a 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.

• A. $B$, $D$ and $E$ Only
• B. $C$, $D$ and $E$ Only
• C. $A$, $B$ and $E$ Only
• D. $A$, $C$ and $D$ Only

Hint:

Understanding the physical principles behind measurements can help clarify which variables influence the results in experimental setups.

Answer 1

The Correct Option is B

Step 1: Analyze each statement. A: Incorrect, as the graph is not a parabola but rather a more complex function of radius and viscosity.
B: Incorrect, as terminal velocity varies with ball size and density.
C: Correct, as viscosity and terminal velocity are temperature-dependent.
D: Correct, as variations in terminal velocity can reflect differences in liquid density.
E: Correct, as the initial speed affects the drag force and settling time, influencing the measured viscosity.