Pascal's Law and its Applications NEET Questions

Physics - Properties of Solids and Liquids

Pascal's Law and its Applications MCQ Questions


1.
Pascal's law states that pressure in a fluid at rest is the same at all points which are:
A.
At different heights but same horizontal distance from wall
B.
At the same height (same horizontal level) in the fluid
C.
Near the surface of the fluid
D.
Adjacent to the container walls only
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ANSWER :
B. At the same height (same horizontal level) in the fluid
2.
The second (extended) form of Pascal's law states that when external pressure is applied to any part of a fluid confined in a vessel, it is:
A.
Transmitted only to adjacent layers
B.
Transmitted undiminished and equally in all directions throughout the fluid
C.
Absorbed by the fluid walls
D.
Transmitted only downward due to gravity
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ANSWER :
B. Transmitted undiminished and equally in all directions throughout the fluid
3.
In the proof of Pascal's law, a small prismatic fluid element ABC-DEF is considered. The proof relies on which fundamental condition?
A.
The fluid is flowing at constant velocity
B.
The fluid element is in static equilibrium — net force on each face is zero and forces are normal to surfaces
C.
The element is at the surface of the fluid
D.
The fluid is compressible
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ANSWER :
B. The fluid element is in static equilibrium — net force on each face is zero and forces are normal to surfaces
4.
In the proof of Pascal's law using a prismatic fluid element, the forces on the element are always normal to each face because:
A.
Fluids have very high viscosity
B.
If any tangential component existed, the fluid would flow — contradicting the static condition
C.
Gravity acts perpendicular to all surfaces
D.
The element is very small
😑 View Answer Rough Work Error
ANSWER :
B. If any tangential component existed, the fluid would flow — contradicting the static condition
5.
Pascal's law proves that pressure at a given point in a static fluid:
A.
Acts only in the direction of gravity
B.
Has a specific direction (is a vector)
C.
Acts equally in all directions (is an isotropic scalar)
D.
Is greater in the vertical direction
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ANSWER :
C. Acts equally in all directions (is an isotropic scalar)
6.
For a horizontal bar-shaped fluid element in static equilibrium, the horizontal forces at its two ends must be balanced. This proves:
A.
Pressure varies horizontally in a fluid
B.
Pressure is the same at all points in a horizontal plane of a static fluid
C.
Horizontal pressure is always greater than vertical pressure
D.
Pressure increases with horizontal distance
😑 View Answer Rough Work Error
ANSWER :
B. Pressure is the same at all points in a horizontal plane of a static fluid