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The printer’s ink is an example of
1. Newtonian fluid
2. Non-Newtonian fluid
3. Thixotropic substance
4. Elastic solid

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Correct Answer - Option 3 : Thixotropic substance

Concept:

Newtonian Fluids:

The fluids which obey Newton’s Law of viscosity i.e. shear stress is directly proportional to velocity gradient are called Newtonian Fluids.
Examples:
 Water, air, Petrol, Kerosene, and Mercury.

Non- Newtonian fluids:

The fluids which do not follow Newton’s law of viscosity are called Non- Newtonian fluids.

They are further divided as shown below tabulated form:

Fluid type (Non-Newtonian)

Examples

Dilatants Fluids

Butter, Quick Sand, Sugar in water

Pseudoplastic fluids

Paints, Lipstick, Blood, milk

Thixotropic

Printers ink, Enamels

Rheopatic fluids

Gypsum solution in water, Bentonite Solution

Bingham Plastic Fluid

Sewage sludge, Toothpaste, Drilling mud, Gel

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