JEE Advanced Exam and Fluid Mechanics & Surface Tension


The JEE Advanced exam is a highly competitive entrance exam for admission to prestigious engineering institutes in India. The physics section of the JEE Advanced exam covers a wide range of topics, including fluid mechanics and surface tension. It is important for candidates to have a thorough understanding of these topics to perform well in the exam.


Fluid mechanics is a branch of physics that deals with the study of fluids and their behavior. It involves the study of both liquids and gases and their properties, such as pressure, density, viscosity, and buoyancy. In the JEE Advanced exam, questions from fluid mechanics can be expected, and candidates should be well-prepared to tackle them.


Some key concepts in fluid mechanics that candidates should focus on include:

1. Pressure and Pascal's Law: Candidates should have a clear understanding of pressure and its relation to force and area. They should also be familiar with Pascal's Law, which states that pressure exerted on a fluid is transmitted equally in all directions.

2. Archimedes' Principle: Candidates should know about Archimedes' Principle, which states that an object immersed in a fluid experiences an upward buoyant force equal to the weight of the fluid displaced by the object.

3. Bernoulli's Principle: Candidates should understand Bernoulli's Principle, which states that as the speed of a fluid increases, the pressure exerted by the fluid decreases. They should be able to apply this principle to solve problems related to fluids in motion.


Surface tension is the property of a liquid that allows it to resist an external force. It is caused by the cohesive forces between the molecules of the liquid. In the JEE Advanced exam, questions related to surface tension may be asked, and candidates should have a good grasp of the topic.


Some key concepts in surface tension that candidates should focus on include:

1. Surface Energy: Candidates should understand the concept of surface energy and its relation to surface tension. They should know that the surface energy of a liquid is proportional to its surface area.

2. Capillary Action: Candidates should be familiar with capillary action, which is the rise or fall of a liquid in a small tube due to the adhesive and cohesive forces between the liquid and the tube. They should be able to apply the laws of capillary action to solve problems.

3. Young-Laplace Equation: Candidates should know about the Young-Laplace equation, which relates the pressure difference across a curved liquid interface to the radius of curvature of the interface. They should be able to use this equation to solve problems related to curved liquid surfaces.


In the physics section of the JEE Advanced exam, questions from fluid mechanics and surface tension can be expected. Candidates should focus on understanding the key concepts and principles in these topics and practice solving problems to improve their performance in the exam.