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31 Year NEET Previous Year Questions: Mechanical Properties of Fluids


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6 Questions MCQ Test Physics Class 11 | 31 Year NEET Previous Year Questions: Mechanical Properties of Fluids

31 Year NEET Previous Year Questions: Mechanical Properties of Fluids for NEET 2023 is part of Physics Class 11 preparation. The 31 Year NEET Previous Year Questions: Mechanical Properties of Fluids questions and answers have been prepared according to the NEET exam syllabus.The 31 Year NEET Previous Year Questions: Mechanical Properties of Fluids MCQs are made for NEET 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for 31 Year NEET Previous Year Questions: Mechanical Properties of Fluids below.
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31 Year NEET Previous Year Questions: Mechanical Properties of Fluids - Question 1

The terminal velocity vr of a small steel ball of radius r falling under gravity through a column of a viscous liquid of coefficient of viscosity η depends on mass of the ball m, acceleration due to gravity g, coefficient of viscosity η and radius r. Which of the following relations is dimensionally correct ? [1992]

Detailed Solution for 31 Year NEET Previous Year Questions: Mechanical Properties of Fluids - Question 1

Note that according to Stoke's law 6πrvr = mg

Hence, the valid relation is vr = mg /rη

31 Year NEET Previous Year Questions: Mechanical Properties of Fluids - Question 2

In rising from the bottom of a lake, to the top, the temperature of an air bubble remains unchanged, but its diameter gets doubled. If h is the barometric height (expressed in m of mercury of relative densityρ) at the surface of the lake, the depth of the lake is [1994]

Detailed Solution for 31 Year NEET Previous Year Questions: Mechanical Properties of Fluids - Question 2

This gives H = 7hρ

31 Year NEET Previous Year Questions: Mechanical Properties of Fluids - Question 3

The angle of contact between pure water and pure glass, is [1996]

Detailed Solution for 31 Year NEET Previous Year Questions: Mechanical Properties of Fluids - Question 3

We know that angle of contact is the angle between the tangent to liquid surface at the point of contact and solid surface inside the liquid. In case of pure water and pure glass, the angle of contact is zero.

31 Year NEET Previous Year Questions: Mechanical Properties of Fluids - Question 4

A rectangular block of mass m and area of crosssection A floats in a liquid of density ρ. If it is given a small vertical displacement from equilibrium it undergoes  oscillation with a time period T. Then [2006]

Detailed Solution for 31 Year NEET Previous Year Questions: Mechanical Properties of Fluids - Question 4

Let the body be depressed by distance x from its equilibrium position. The extra upthrust created is xρAg which applies to whole body.
If a be acceleration created then,

Since, acceleration αx, so, it is equation of S.H.M.

31 Year NEET Previous Year Questions: Mechanical Properties of Fluids - Question 5

The wetability of a surface by a liquid depends primarily on [NEET 2013]

Detailed Solution for 31 Year NEET Previous Year Questions: Mechanical Properties of Fluids - Question 5

Wetability of a surface by a liquid primarily depends on angle of contact between the surface and liquid.
If angle of contact is acute liquids wet the solid and vice-versa.

31 Year NEET Previous Year Questions: Mechanical Properties of Fluids - Question 6

A fluid is in streamline flow across a horizontal pipe of variable area of cross section. For this which of the following statements is correct? [NEET Kar. 2013]

Detailed Solution for 31 Year NEET Previous Year Questions: Mechanical Properties of Fluids - Question 6

According to Bernoulli’s theorem,

= constant and Av = constant

If A is minimum, v is maximum, P is minimum.

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