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    Question

    The normal stress in a fluid will be constant in all directions at a point only if 

    A

    it is incompressible

    B

    it has uniform viscosity

    C

    it has zero viscosity

    D

    it is friction less

    E

    it is at rest

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    Updated on : 2022-09-05

    Solution Verified by Toppr

    Correct option is E)

    If the body is at hydro-static balance which means the liquid is at rest, then the normal stress in fluid will be constant in all directions at a point.  

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    [Solved] The normal stress is the same in all directions at a point i

    Explanation: The pressure at any point in a fluid at rest has the same magnitude in all directions. In other words, when a certain pressure is applied at an

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    The normal stress is the same in all directions at a point in a fluid only when

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    The fluid is frictional

    The fluid is frictionless and incompressible

    The fluid has zero viscosity and is at rest

    One fluid layer has no motion relative to an adjacent layer

    Answer (Detailed Solution Below)

    Option 4 : One fluid layer has no motion relative to an adjacent layer

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    Detailed Solution

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    Explanation:

    The pressure at any point in a fluid at rest has the same magnitude in all directions.

    In other words, when a certain pressure is applied at any point in a fluid at rest, the pressure is equally transmitted in all the directions and to every other point in the fluid. It is known as Pascal’s Law.​

    Pascal's Law:

    Pascal's principle states that pressure applied to fluids is equally transmitted in all directions, to all parts of the fluid and to all parts of a container.

    The increase in pressure at one point of the enclosed liquid in an equilibrium of rest is transmitted equally to all other points of the liquid and also to the walls of the container, provided the effect of gravity is neglected.

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    स्रोत : testbook.com

    The normal stress in a fluid will be constant in all

    The normal stress in a fluid will be constant in all directions at a point only if a) it is incompressible b) it has uniform viscosity c) it is frictionless d) it is at rest

    Examveda

    The normal stress in a fluid will be constant in all directions at a point only if

    A. it is incompressible

    B. it has uniform viscosity

    C. it is frictionless

    D. it is at rest

    Answer: Option D

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