Question

Density of an ideal fluid is always _____
1. constant
2. zero
3. decreasing
4. increasing

Answer 1

Correct Answer - Option 1 : constant

Explanation:

Ideal fluid:

• A fluid, which is incompressible and is having no viscosity, is known as an ideal fluid.
• Ideal fluid is only an imaginary fluid as all the fluids, which exist, have some viscosity.
• Hence a fluid which has constant density and has zero viscosity is known as ideal fluid
• Ideal fluid obeys following two equations
  • Continuity equation
  • Bernouilli’s equation

Real fluid

• Fluids which do possess viscosity are termed as real fluids.
• These fluids always offer shear resistance i.e. Certain amount of resistance is always offered by these fluids as they move.
• All the fluids that exist in reality are real fluids.