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Q1:

A viscous liquid is flowing through a straight tube under the action of a pressure difference across the ends of the tube. The tube is aligned with the \(x\)-axis. The force exerted on the tube by the liquid has the form:
\((a,b>0)\)

1.	\(a\hat i\)	2.	\(-a\hat i\)
3.	\(a\hat i+b\hat j\)	4.	\(-a\hat i+b\hat j\)

Subtopic: Viscosity |

Level 3: 35%-60%

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Q2:

Given below are two statements:

Assertion (A):	The viscosity of a gas decreases as the temperature is increased.
Reason (R):	When temperature increases, the random molecular motion of the gas molecules increases.

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	(A) is False but (R) is True.

Subtopic: Viscosity |

Level 3: 35%-60%

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Q3:

A viscous liquid flows slowly through a pipe of cross-sectional radius \(R.\) The speed of the particles is a function of the distance from the axis of the pipe.