NEET Physics: Bernoulli's principle and its applications Practice Questions
15 free multiple-choice questions on Bernoulli's principle and its applications (Properties of Solids and Liquids) for NEET Physics, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. A container holds water at rest. If the water is allowed to flow into a narrower pipe, what happens to the pressure inside the container?
Show answer & explanation
Correct answer: C — The pressure decreases
According to Bernoulli's principle, when the flow area decreases (pipe narrows), the velocity of the fluid increases. Since pressure is inversely related to velocity, the pressure inside the container decreases.
Q2. If the height of a fluid above a reference point increases, assuming the flow velocity remains constant, what happens to the static pressure according to Bernoulli's principle?
Show answer & explanation
Correct answer: A — Pressure decreases
As height increases, the potential energy increases, which must be balanced by a decrease in pressure, assuming velocity is constant.
Q3. If the flow velocity of a fluid is doubled in a tube, assuming the cross-sectional area remains constant, how does the kinetic energy of the fluid change?
Show answer & explanation
Correct answer: C — It is quadrupled
Kinetic energy is proportional to the square of the velocity (KE = 1/2mv²). If velocity doubles, kinetic energy increases by a factor of 2² = 4.
Q4. According to Bernoulli's principle, if the speed of a fluid flowing through a tube increases, what happens to the static pressure in that region?
Show answer & explanation
Correct answer: D — The static pressure decreases
Bernoulli's principle states that for an incompressible, inviscid flow, an increase in the speed of the fluid results in a decrease in the static pressure.
Q5. Bernoulli's principle is fundamentally based on the conservation of which physical quantity in a flowing fluid?
Show answer & explanation
Correct answer: D — Energy
Bernoulli's principle is derived from the conservation of mechanical energy (or total energy) along a streamline, which is a form of energy conservation in fluid dynamics.
Q6. In a situation where the height of a fluid column decreases, what happens to the pressure exerted by the fluid?
Show answer & explanation
Correct answer: C — Pressure increases
When the height (h) decreases, the potential energy term (ρg h) decreases, leading to an increase in the pressure along the streamline (assuming velocity is constant).
Q7. In a horizontal pipe where the cross-sectional area of the pipe decreases, what is the pressure difference across the section, assuming the flow is steady?
Show answer & explanation
Correct answer: B — The pressure increases
Since the fluid is incompressible and the flow is steady, if the area decreases, the velocity must increase, and consequently, the static pressure must decrease according to the principle.
Q8. The term 1/2ρv² in Bernoulli's equation represents which type of energy associated with the fluid flow?
Show answer & explanation
Correct answer: C — Kinetic Energy
The term 1/2ρv² represents the dynamic pressure or the kinetic energy per unit volume associated with the motion of the fluid.
Q9. According to Bernoulli's principle, for an ideal fluid flowing along a streamline, what happens to the static pressure if the fluid velocity increases?
Show answer & explanation
Correct answer: A — It decreases
Bernoulli's principle states that for an incompressible, inviscid flow, the sum of pressure, kinetic energy, and potential energy remains constant along a streamline. If the velocity increases, the kinetic energy term increases, and thus the static pressure must decrease to maintain the balance.
Q10. If the flow velocity of a fluid decreases, what is the corresponding change in the static pressure in a pipe, assuming constant density?
Show answer & explanation
Correct answer: D — Pressure increases
Since pressure is inversely proportional to velocity (P ∝ 1/v), a decrease in flow velocity leads directly to an increase in the static pressure within the pipe.
Q11. When a fluid flows through a tube where the cross-sectional area suddenly decreases, what happens to the fluid's velocity according to Bernoulli's principle?
Show answer & explanation
Correct answer: A — The velocity increases, and the pressure decreases.
Bernoulli's principle states that for an incompressible, non-viscous fluid in flow, an increase in fluid speed occurs simultaneously with a decrease in pressure. When the cross-sectional area decreases, the flow velocity must increase to maintain continuity, thus the pressure must decrease.
Q12. The phenomenon of lift generated by an airplane wing is fundamentally explained by which principle?
Show answer & explanation
Correct answer: C — Bernoulli's Principle
Lift is generated due to the difference in air speed over the curved upper surface and the flatter lower surface of the wing, resulting in a lower pressure above the wing, creating an upward force (lift).
Q13. A nozzle converts pressure energy into kinetic energy. This energy conversion is a direct consequence of which principle?
Show answer & explanation
Correct answer: C — Bernoulli's Principle
Bernoulli's principle describes the relationship between pressure and kinetic energy (motion) in a flowing fluid, relating static pressure to dynamic pressure.
Q14. According to Bernoulli's principle, what happens to the pressure of a fluid as its speed increases?
Show answer & explanation
Correct answer: D — Pressure decreases
Bernoulli's principle states that for an incompressible, non-viscous fluid flowing along a streamline, an increase in the fluid's speed occurs where the pressure is lower. Thus, increased speed means decreased pressure.
Q15. When a fluid flows from a region of high pressure to a region of low pressure, what happens to the fluid's velocity?
Show answer & explanation
Correct answer: B — Velocity increases
According to Bernoulli's principle, for the total energy to remain constant, an increase in pressure must be balanced by a decrease in kinetic energy (and thus velocity).
Keep going — practice on Padhai Karlo
Padhai Karlo gives you unlimited NEET practice: chapter-wise questions, timed quizzes, and full mock tests with an All-India Rank — free to start.
Get the free Android app →