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NEET Physics: Effect of gravity on fluid pressure Practice Questions

14 free multiple-choice questions on Effect of gravity on fluid pressure (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.

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  1. Q1. In a container filled with water, if the depth of the water is doubled, what happens to the pressure exerted on the bottom of the container?

    • AIt is quadrupled
    • BIt is halved
    • CIt is doubled
    • DIt remains the same
    Show answer & explanation

    Correct answer: C — It is doubled

    Since pressure (P) is directly proportional to depth (h) (P = ρg h), doubling the depth will double the pressure exerted on the bottom.

  2. Q2. When water is held in a container, the pressure exerted by the fluid at a certain depth depends on which of the following factors?

    • AThe surface tension of the water
    • BThe shape of the container
    • CThe density of the water and the acceleration due to gravity
    • DThe volume of the container
    Show answer & explanation

    Correct answer: C — The density of the water and the acceleration due to gravity

    The hydrostatic pressure (P) exerted by a fluid at a certain depth (h) is given by the formula P = ρg h, where ρ is the density of the fluid, g is the acceleration due to gravity, and h is the depth. Therefore, pressure depends directly on the density, gravity, and depth, regardless of the container's shape or volume.

  3. Q3. When a liquid is held in a container, the pressure exerted by the liquid at a certain depth increases as the depth increases. This phenomenon is directly due to:

    • Aincrease in the effect of gravity acting on the fluid column
    • Bincrease in the force exerted by the container walls
    • Cchange in the volume of the liquid
    • Ddecrease in the density of the liquid
    Show answer & explanation

    Correct answer: A — increase in the effect of gravity acting on the fluid column

    Fluid pressure at a certain depth is caused by the weight of the fluid column directly above that point. Since the gravitational force depends on the depth (height), the pressure increases with depth due to the effect of gravity.

  4. Q4. Which physical quantity is responsible for the pressure exerted by a fluid due to gravity?

    • AThe momentum of the fluid particles
    • BThe kinetic energy of the fluid
    • CThe surface tension of the fluid
    • DThe weight of the fluid column
    Show answer & explanation

    Correct answer: D — The weight of the fluid column

    Pressure due to gravity arises from the weight of the fluid column, which is the mass times the acceleration due to gravity (W = mg).

  5. Q5. Hydrostatic pressure in a fluid is caused by the weight of the fluid column above the point. If the density of the fluid is constant, how does the pressure change with depth?

    • APressure is inversely proportional to depth
    • BPressure decreases linearly with depth
    • CPressure remains constant
    • DPressure increases linearly with depth
    Show answer & explanation

    Correct answer: D — Pressure increases linearly with depth

    Hydrostatic pressure increases linearly with depth because the weight of the fluid column above the point increases proportionally with depth.

  6. Q6. If the depth of a liquid column is doubled while keeping the density and acceleration due to gravity constant, how does the pressure exerted by the fluid change?

    • AIt remains the same
    • BIt is halved
    • CIt is doubled
    • DIt is quadrupled
    Show answer & explanation

    Correct answer: C — It is doubled

    Since pressure P is directly proportional to depth h (P = ρg h), doubling the depth doubles the pressure.

  7. Q7. If two points in a liquid are at the same horizontal level, but one point is at a greater depth than the other, which point will experience higher pressure?

    • AThe pressure will be equal at both points
    • BThe point at the greater depth
    • CThe point at the shallower depth
    • DThe pressure depends only on the density
    Show answer & explanation

    Correct answer: B — The point at the greater depth

    Since pressure is directly proportional to depth (P ∝ h), the point at the greater depth will experience higher fluid pressure.

  8. Q8. The pressure exerted by a column of fluid depends on the weight of the fluid column above that point. This statement is fundamentally based on which physical principle?

    • AArchimedes' principle
    • BThe principle of hydrostatic equilibrium
    • CBernoulli's principle
    • DPascal's principle
    Show answer & explanation

    Correct answer: B — The principle of hydrostatic equilibrium

    Fluid pressure is derived from the weight of the fluid column, which is directly related to the gravitational force and the volume/density of the fluid above the point. This is the principle of hydrostatic equilibrium.

  9. Q9. Consider two liquids, Liquid A (density ρ_A) and Liquid B (density ρ_B), at the same depth in the same container. If ρ_A > ρ_B, which liquid exerts a greater pressure at that depth?

    • APressure depends only on depth
    • BLiquid A
    • CBoth exert equal pressure
    • DLiquid B
    Show answer & explanation

    Correct answer: B — Liquid A

    Since pressure P = ρg h, and g and h are the same for both, the liquid with the greater density (ρ) will exert the greater pressure.

  10. Q10. The pressure exerted by a fluid at a certain depth depends primarily on which of the following factors?

    • ADepth of the fluid
    • BDensity of the fluid
    • CAcceleration due to gravity
    • DAll of the above
    Show answer & explanation

    Correct answer: D — All of the above

    The gauge pressure (pressure due to the fluid itself) is directly proportional to the depth (P = ρg h). Therefore, depth, density, and gravity are all factors influencing the fluid pressure at a specific point.

  11. Q11. The hydrostatic pressure exerted by a fluid at a certain depth depends directly on which physical property of the fluid?

    • AThe surface tension of the fluid
    • BThe density of the fluid
    • CThe acceleration due to gravity
    • DThe volume of the container
    Show answer & explanation

    Correct answer: C — The acceleration due to gravity

    Hydrostatic pressure (P = ρg h) depends directly on the density (ρ) of the fluid, the acceleration due to gravity (g), and the depth (h).

  12. Q12. A fluid at rest in a container exerts pressure. If the depth of the fluid layer is doubled while the density of the fluid remains constant, how does the pressure exerted on the container walls change?

    • AThe pressure is halved
    • BThe pressure remains the same
    • CThe pressure is doubled
    • DThe pressure increases by a factor of four
    Show answer & explanation

    Correct answer: C — The pressure is doubled

    Fluid pressure depends on the depth (h) and the density (ρ) of the fluid, given by P = ρg h. If the depth (h) is doubled and density (ρ) and gravity (g) remain constant, the pressure (P) will also double.

  13. Q13. If the acceleration due to gravity (g) on Earth were suddenly halved, how would the hydrostatic pressure experienced by a fixed depth of water change?

    • AIt would be doubled
    • BIt would remain unchanged
    • CIt would be quadrupled
    • DIt would be halved
    Show answer & explanation

    Correct answer: D — It would be halved

    Since pressure P = ρg h, if g is halved while ρ and h remain constant, the pressure will also be halved.

  14. Q14. A container filled with water is subjected to the effect of gravity. The pressure exerted by the water on the base of the container increases as the depth of the water increases. This phenomenon is directly related to which property of the fluid?

    • ASpecific Heat
    • BDensity
    • CSurface Tension
    • DViscosity
    Show answer & explanation

    Correct answer: B — Density

    The pressure exerted by a fluid column is directly proportional to the density (ρ) of the fluid and the depth (h) due to the gravitational force. Pressure at a certain depth is determined by the weight of the fluid column above it, which depends fundamentally on density and gravity.

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