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What is Pascal's Law?The French mathematician, scientist, inventor, and theologian Blaise Pascal in 1653 published his work on fluids ‘The physical treatises of Pascal: the equilibrium of liquids’, in which he discussed principles of static fluids. A fluid at rest is a static fluid and such a state of the fluid is said to be static equilibrium. If the fluid under consideration is water then we say it is in hydrostatic equilibrium. In static equilibrium, the net force on any part of the fluid must be zero at all times otherwise the fluid will start to flow. Fluid taken here for the study is incompressible i.e., its density will remain constant.
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Statement: Let us see how the National Council for Educational Research and Training (NCERT) treats Pascal’s law, also known as Pascal's principle. This principle states that when a change in pressure is applied to an enclosed fluid, it is transmitted equally and undiminished to all portions of the fluid and to the walls of its container.
In the above illustration, you can see that pressure is applied on the sponge ball by pressing it with the thumb and according to Pascal’s law we know that the pressure applied is transmitted equally in all directions. Hence, fluid is released with the same pressure through the pores of the sponge ball.
Before discussing the application of Pascal’s law, let us look at the mathematical expression of Pascal’s law. Suppose you apply force F1 on one of the movable pistons (left side) thereby exerting pressure p1 on the cylindrical container of cross-sectional area A1. Because of the change in pressure due to force F1, it transmits equally and undiminished to all portions of fluids.
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This ebook serves as a valuable study guide for NEET exams, specifically designed to assist students in light of recent changes and the removal of certain topics from the NEET exam.
Download EBookFrom Pascal’s law,
Pressure applied on one of the left cylinders is equal to the pressure exerted on the right cylinder
Pascal's Law formula(Image: Shutterstock)
The hydraulic system is based on Pascal's principle of transmission of fluid pressure equally and undiminished in all directions. Let us discuss the application of Pascal’s law
Hydraulic Lift
Hydraulic Lift(Image: Shutterstock)
In a hydraulic lift, fitted with airtight cylinders, there are two cylinders; a narrow cylinder A is connected with a wider cylinder B by an ideal fluid (incompressible). The lowering of the piston fitted to cylinder A because of application of pressure is transmitted equal and undiminished to the piston fitted to cylinder B by virtue of Pascal’s law. As a result the platform cum piston connected with the wider cylinder is lifted up.
Advantages of Hydraulic Lifts:
It is cheaper to install than other elevator types.
It is more portable than other elevating means.
Disadvantages of Hydraulic Lifts:
It has a relatively slow lifting speed.
Fluid (oil in the given case) in the piston system can overheat quickly due to compression, so an efficient cooling mechanism is needed.
Slight jerk may be felt compared to the other lift systems.
The lifting mechanism of a hydraulic lift that we have shown here is utilizing mechanical power (because of the pressing of the piston by a person as shown in the figure) but for practical purposes we use an electrically powered pump in which fluid is pushed into a jack lifting system to lift the platform up.
Electrically powered hydraulic lifting system
Pistons within a cylinder at the base of the lift provide the power to the elevator to move the object placed over it up and down.
Hydraulic Brakes
Application of Pascal's law: Hydraulic brake system
The braking systems of cars, trucks, etc. are based on Pascal's law. The hydraulic brakes allow equal pressure to be transmitted throughout the liquid. It consists of a master cylinder, four-wheel cylinders (slave cylinder), and pipeline carrying braking fluid from the master cylinder to a slave cylinder.
Brakes Applied: When the brake pedal is pressed, the force exerted applies pressure on the piston connected with the master cylinder and the pressure applied is transmitted equally and undiminished with the help of braking fluid via metal pipeline. The increase in pressure applied after pressing the pedal transmits to all the pistons of the other cylinders which leads to outward stretching of spring connected with the shoe which in turn presses drum brake. The force of friction between the brake shoe and the drum brake stops the wheels. The spring is extended because of the pressing of the brake shoe with the drum brake and both the arms of the brake shoe are in sync because of the same pressure transmitted by the liquid as per Pascal’s law.
Brakes Released: As soon as the foot is taken off the brake pedal the spring gets relaxed because of the restoring spring force and the liquid is pushed back due to the returning of the piston towards its initial position.
Advantages of Hydraulic Braking System :
Equal braking action on all wheels (equal pressure transmission because of Pascal’s law).
It is easy to build.
The low wear rate of brake linings(a layer of hard material attached to a brake shoe or brake pad to increase friction against the drum or disc).
Disadvantages of Hydraulic Braking System :
The braking system may fail due to leakage of fluid from brake linings.
The presence of air inside the pipeline affects the whole system
Comparatively, it requires frequent maintenance more than the other braking systems.
There are many devices around us that work on the principle of Pascal’s law. It may appear like a simple law but its greatness lies in its application.
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Nov 20, 2024
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List of colleges accepting NEET
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Questions related to NEET
Have a question related to NEET ?
Securing a government medical college seat through NEET needs an eligiblity and as per the eligibility if you are a student of final year BSc is eligible to participate in NEET counselling process and admission.
So if you fail in final year BSc exams it doesn't matter and if you secure a seat in a medical college you can take the admission without any problem.the only problem is the certificates you need to present at the time of document verification.if you fail to provide your documents your seat may get cancelled.
You need to collect your all documents from the college if they coperate you can get certificate easily but if not request them. If you are taking admission on the basis of 12th marks then it may create problem in future so try to get certificate from college.
Hope it helps..
sadafreen356 19 November,2024
The Madhya Pradesh Medhavi Chhatra Yojana (also known as the Medhavi Yojana) provides scholarships to meritorious students based on their performance in the 12th board examinations.the percentage should be more than 75 percent for mp board students and for CBSE and icse it is 85 percent.
You can apply for scholarship and If you come into the meritorious students then the amount is even more than 25000.
If you belong to any school then they will collect your bank information So all in all you do not have to do anything, all the work is to be done by the school. You just enjoy.
Hope it helps
sadafreen356 18 November,2024
From your profile it is clear that you are asking about pharmacy admission through neet so,yes there are some colleges in India which considers NEET score for admission to pharmacy programs.
Other than NEET some state colleges use their own entrance exam like MHT CET, CUET, AP EAMCET, TS EAMCET, KCET, KEAM, and Graduate Pharmacy Aptitude Test (GPAT) for pharmacy.
If you are not satisfied with answer ask again i will try to help you better..
Here are top pharmacy colleges and their admission criteria you can consider
https://pharmacy.careers360.com/colleges/list-of-pharmacy-colleges-in-india
sadafreen356 18 November,2024
If your daughter is currently studying in a CBSE affiliated school in Qatar and has been living abroad for the past few years, she will likely qualify for an NRI seat when applying for NEET, as she meets the criteria of being an Indian citizen residing abroad and completing her 10th and 12th education from a foreign country.
NRI students can apply NEET UG under NRI category. Your daughter will be applying for seats under AIQ quota i.e 15% seats only .some states dont give reservation to NRI like Karnataka but some states like gujarat has NRI reservation.while considering colleges check specific eligibility criteria of the medical colleges you are applying to, as there may be minor variations in their NRI admission policies.
Have a look on details of NRI category NEET admission
sadafreen356 18 November,2024
Hello,
Yes, it is possible to get admission into medical-related courses without clearing the NEET exam. Here’s how:
-
Alternative Medical Courses :
- B.Sc. Nursing : Colleges like AIIMS (for nursing), Christian Medical College (CMC), Vellore , and St. John's Medical College, Bengaluru offer nursing programs.
- B.Sc. Biotechnology/Biomedical Science : Jamia Millia Islamia, Delhi and Manipal Academy of Higher Education provide such programs.
-
Allied Health Sciences :
- Programs such as B.Sc. Radiology , B.Sc. Medical Laboratory Technology (MLT) , and B.Pharm are offered at institutions like Amity University , Lovely Professional University (LPU) , and SRM University, Chennai .
-
Paramedical Courses :
- Courses like Physiotherapy (BPT) , Occupational Therapy , and Optometry are available at Manipal College of Health Professions and Apollo Institute of Hospital Administration .
-
Overseas Admissions :
- Countries like the Philippines , Russia , and China offer MBBS without NEET but require other eligibility criteria.
These colleges and courses offer reputable options outside of the NEET pathway.
To know more, visit : https://medicine.careers360.com/articles/medical-courses-without-neet
Hope it helps !
Prachi Kumari 17 November,2024
Popular NEET Questions
the product 'P' will be ,
Option: 1
Option: 2
Option: 3
Option: 4
| Column A | Column B |
| A |
a) Organisation of cellular contents and further cell growth. |
| B |
b) Leads to formation of two daughter cells. |
| C |
c) Cell grows physically and increase volume proteins,organells. |
| D |
d) synthesis and replication of DNA. |
Match the correct option as per the process shown in the diagram.
Option: 1
1-b,2-a,3-d,4-c
Option: 2
1-c,2-b,3-a,4-d
Option: 3
1-a,2-d,3-c,4-b
Option: 4
1-c,2-d,3-a,4-b
0.16 g of dibasic acid required 25 ml of decinormal solution for complete neutralisation. The modecular weight of the acid will be
Option: 1
32
Option: 2
64
Option: 3
128
Option: 4
256
0xone is
Option: 1
Option: 2
Option: 3
Option: 4
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