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The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of thickness. For example, Syrup has a higher viscosity than water. Viscosity can be conceptualized as quantifying the frictional force that arises between adjacent layers of fluid that are in relative motion.

Chapter Analysis:

Expect for the year of 2015 and 2013, no question has been asked from this chapter in the other years. The last 4 years have had a drought for the questions from this chapter. Hence, we should not be expecting any question from this chapter in the upcoming paper.
The below given graph will illustrate the above-mentioned analysis:

Year 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009
Questions 0 0 0 0 1 0 1 0 0 0 0

The important topics to be covered from this chapter are:
• Viscosity
• Stokes Law
• Terminal Velocity
• Streamline and Turbulent Flow
• Critical Velocity
• Bernoulli’s Theorem and its applications


Tips and Tricks:

• NCERT will form the base for the understanding of further queries and it provides a stern platform to further work on. Here is the NCERT PDF version of the chapter:
• There are various flow charts in this chapter. Hence, they must be created in a single large sheet of paper and looked upon at regular intervals.
• There is a huge number of unique terms and keywords. Hence, they must be revised regularly. Once in a fortnight is a must.
• The diagrams must be practiced and understood clearly. Video explanations can be looked onto if one finds difficulty in understanding the diagram.


Q. ?