By Team Aakash Byju's
‘Viscosity’ is defined as the measure of the resistance of a fluid to flow.
The viscosity of liquid varies inversely with the temperature whereas the viscosity of gases increases with an increase in temperature.
Thus, heating causes liquids to flow easily and gases to flow slowly.
This means if the viscosity of a fluid is less, the fluid will move easier and faster.
Where F is the viscous force acting upon the area A. dv/dy is the velocity gradient.
Viscosity or viscous force is expressed in terms of the coefficient of viscosity, η as
An example to explain viscosity can be honey and water. We know that honey is thicker than water as it is more viscous than water.
Since the honey has more viscosity, it flows at a slower rate compared to water.