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# Pressure & Pascal's Principle Video Lecture - Physics Class 11 - NEET

## Physics Class 11

116 videos|451 docs|188 tests

## FAQs on Pressure & Pascal's Principle Video Lecture - Physics Class 11 - NEET

 1. What is pressure and how is it measured? Ans. Pressure is defined as the force exerted per unit area on a surface. It can be measured using various units such as pascals (Pa), pounds per square inch (psi), or atmospheres (atm). Pascal (Pa) is the SI unit of pressure, and it is equivalent to one newton per square meter (N/m²).
 2. What is Pascal's principle and how does it work? Ans. Pascal's principle states that when an external pressure is applied to a fluid in a confined space, the pressure is transmitted uniformly in all directions. This means that any change in pressure applied to an enclosed fluid will be equally distributed throughout the fluid. It works based on the fact that fluids are not compressible, and thus, the pressure applied at one point will be transmitted to all other points within the fluid.
 3. How does Pascal's principle apply to hydraulic systems? Ans. Pascal's principle is the fundamental principle behind the operation of hydraulic systems. In a hydraulic system, a small force applied to a small piston can generate a larger force on a larger piston by utilizing the principle of transmitting pressure equally. This allows for the amplification of force, making hydraulic systems useful in various applications such as car brakes, construction machinery, and elevators.
 4. What are some practical applications of Pascal's principle? Ans. Pascal's principle finds numerous practical applications in our daily lives. Some examples include hydraulic car lifts, hydraulic jacks, hydraulic brakes in vehicles, hydraulic presses used in manufacturing, and even the functioning of our cardiovascular system. It is also utilized in the operation of heavy machinery, cranes, and excavators.
 5. What is the relationship between pressure and depth in a fluid? Ans. The relationship between pressure and depth in a fluid is described by Pascal's law. According to this law, the pressure exerted by a fluid increases with depth. This is because the weight of the fluid above a certain point causes an increase in pressure at that point. The relationship can be mathematically expressed as P = ρgh, where P is the pressure, ρ is the density of the fluid, g is the acceleration due to gravity, and h is the depth of the fluid.

## Physics Class 11

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