Class 12 Physics Fluid statics Notes and Important Questions
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Notes for Class 12 Fluid statics (Physics) are shown above.
Practice
Important Questions
Two spherical rain drops of equal size are falling vertically downward with terminal velocity of 0.15 m/s. What would be the terminal velocity if these drops were combined to form a larger drop?
0.15 m/s
0.24 m/s
0.31 m/s
0.48 m/s
Two capillary tubes P and Q of radii 4 mm and 2 mm are dipped in water. What is the ratio of heights through which liquid rises in the tubes P and Q?
1:2
2:1
1:4
4:1
State Bernoulli’s principle.
Figure below shows a liquid of density $1200\ \text{kg m}^{-3}$ flowing steadily in a tube of varying cross-sections. The cross section at point A is $1.0\ \text{cm}^2$ and that at B is $20\ \text{mm}^2$, points A and B are in the same horizontal plane. The speed of the liquid at A is $10\ \text{cm s}^{-1}$. Calculate
the speed at B.
the difference in pressure at A and B.
State Stoke's law and use it to derive an expression for the determination coefficient of viscosity of given liquid.
Write equation of continuity. Also write its two applications.
A horizontal stream of air is blown under one of the pans of a beam balance as shown in the figure. What will be the effect of this on the pan?
goes up
goes down
remains unaffected
rotates
Bernoulli's Principle is based on the law of conservation of
Mass
Energy
Linear Momentum
Angular Momentum
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Exam
Past Question Analysis
Historical exam-pattern data from past NEB question papers — not a prediction of future questions.
13
Question Items
16
Total Marks
5
Papers Appeared In
| Year | Question Items | Marks |
|---|---|---|
| 2083 | 2 | 1 |
| 2082 | 1 | 1 |
| 2081 | 1 | 1 |
| 2080 | 1 | 1 |
| 2078 | 8 | 12 |
Also appears in 3 model questions (not counted above — model sets aren't actual NEB exam history).
Fluid Statics examines the behavior of fluids under pressure and in motion. The chapter covers buoyancy, surface tension, capillarity, viscosity, Poiseuille's formula, Stokes' law, continuity equation and Bernoulli's principle.
This page covers Fluid statics, chapter 3 of 25 in the Class 12 Physics syllabus set by the National Examination Board (NEB). 17 important questions for this chapter are available, each with a full solution.
For numerical and derivation-based chapters like this one, working through past NEB questions is usually more useful than re-reading notes alone — try solving each important question above before checking the solution, then compare your working step by step.