Q.

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

  • AOnly when the fluid is frictionless 
  • BOnly when the fluid is incompressible and has zero viscosity
  • CWhen there is no motion of one fluid layer relative to an adjacent layer
  • DIrrespective of the motion of one fluid layer relative to an adjacent layer
Correct Answer : (C)

When there is no motion of one fluid layer relative to an adjacent layer

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