JEE Main 2020 Registration started on jeemain.nic.in - Details and Guidelines - How to Apply

Joint Entrance Examination Main - JEE Main 2020 Registration will start shortly on jeemain.nic.in. Relax… here we have given step by step instructions of how to apply online for NTA JEE Main 2020 January Exam, syllabus, eligibility criteria and more.

JEE Main 2020 Registration: 

Joint Entrance Examination, JEE Main 2020 registration for January 2020 examination will start anytime today, September 3, 2019 on jeemain.nic.in. Students interested in taking up engineering courses in IITs, NITs, IIITs and other GFTIs are required to appear for JEE Main 2020 examination.

IIT and other engineering aspirants must be aware that the JEE Main 2020 exam pattern has been revised by National Testing Agency (NTA). As per NTA, the number of questions and their pattern has been revised (see the changes and syllabus as released by NTA by clicking on the link here).

JEE Main 2020 Eligibility:

Students studying in their Class 12 or who have completed their class 12 examinations in Physics, Chemistry, Mathematics and two other subjects are eligible to apply for JEE Main 2020. Please note, students who completed their Class 12 or any other qualifying examination in 2018, 2019 or the ones who would be appearing in 2020 are only eligible for JEE Main 2020 (link given hereunder for list of such exams).

Students who qualified in 2017 are not eligible to appear for JEE Main 2020.

Also, for JEE Main 2020 Paper II, students are required to have qualified in Physics, Chemistry and Mathematics. Instead of the 5 subject rule, the four subject rule is applicable for JEE Main 2020.

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JEE Main 2020 Syllabus:

As per the official website jeemain.nic.in, JEE Main 2020 syllabus is almost same as in Class 11 and Class 12 curriculum for Physics, Chemistry and Mathematics. Here is

JEE Main 2020 Syllabus is for quick reference.

JEE Main 2020 Important Dates:

• Online JEE Main 2020 Registration begins: September 3, 2019
• Last date to apply online: September 30, 2019
• Download of JEE Main 2020 Admit Card: From December 16, 2019
• Exam Dates: between January 6 to January 11, 2020 (will be confirmed by NTA later)

Joint Entrance Examination 2020 (Main) aspirants to note that

• Students who are eligible can apply for either / both of the two examinations which would be conducted by NTA. Only the better of the two scores would be considered for final merit list and rank calculation which would be released after JEE Main 2020 II paper result in April, 2020.
• JEE Main 2020 examination to be held in January’20 would be conducted only in Computer Based Test or CBT format. The Paper II, however, would be a pen and paper based test as was the earlier pattern.
• Students are advised to fill the online application forms at the earliest so that he / she can be allotted exam center as per his / her choice.
• The eligibility age limit would be calculated bases the April 2020 examination and there is no upper age limit.
• Students who have qualified the Class 12 or equivalent examination in 2017 or before are not eligible for JEE Main 2020 (Neither January nor April examinations).

JEE Main 2020 - How to Apply Online:

Candidates interested are required to fill the online application form on jeemain.nic.in, once it is released. NTA has released a step by step document on how to fill JEE Main 2020.

The 4 steps to apply are –

1. Registration,
2. Filling online application,
3. Uploading scanned images etc. and
4. Paying the application fees.

To download or check complete information about the Mode of Exam & Questions Pattern, Schedule for Exam & Result, State Eligibility, List and Year of Appearance in Qualifying Exams, Categories with Reservations percentages, NTA JEE (Main) 2020 Application Fees, Details regarding admission to NITs, IIITs, CFTIs, SFIs, State Engineering Colleges for Participating States and other Participating Engineering Colleges / Institutions, click on the link below -    

JEE Main 2020 Complete Official Information

 EduNews 
NEET Counselling 2019: Medical Council Committee released list of eligible candidates to fill in the vacant MBBS seats 

NEET Counselling 2019: Medical Council Committee released list of eligible candidates to fill in the vacant MBBS seats

Medical Council Committee (MCC) releases list of eligible candidates to fill in the vacant MBBS seats left after NEET counselling 2019.

NEET counselling 2019: Among the vacant MBBS seats, several are in IP University, Delhi University (DU) and Aligarh Muslim University (AMU). In the ESIC Medical Institute as well several seats are left vacant and a separate list of candidates eligible for admission to these seats is released.

The Medical Council Committee (MCC) released the list of eligible candidates to fill in the seats left vacant after counselling rounds. Candidates who have qualified the National Eligibility cum Entrance Test (NEET) 2019 and are yet to secure a seat can check the list at mcc.nic.in.

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Among the vacant seats, several are available in the IP University, Delhi University and Aligarh Muslim University. In the ESIC medical institute as well several seats are left vacant and a separate list of candidates eligible for admission to these seats is released.

After conducting three counselling rounds for NEET - based admission, a final mop-up round was conducted earlier for vacant seats. A total of 2,004 students have been allotted colleges under mop-up round.

The counselling process for over 7 lakh candidates who qualified the National Eligibility cum Entrance Test (NEET) 2019 began in June. The qualifying criteria for this category are 50th percentile for the reserved category the minimum marks are 40 percentile.

For those who could not clear the exam this year, NEET 2020 is scheduled to be held on May 3, 2020 (Sunday). This is the second time the National Testing Agency (NTA) will be conducting the NEET. The application process will begin from December 2 and will close on December 31. Interested candidates can apply at — ntaneet.nic.in.

 EduNews 
JEE Main 2020 Registration started on jeemain.nic.in - Details and Guidelines - How to Apply 

Units, Measurements, Error Analysis and Dimensions - Notes on Measurements

In continuation of section wise notes from the chapter Units, Measurements, Dimensions and Error Analysis containing important study materials and more it goes ...

·    Physical World, Physical Quantities - fundamental or basic, derived, supplementary quantities

·    Units - International System of Units, SI Units, Properties and Definitions, Norms for writing unit symbols

·    International System of Units, SI Units, their Properties, Definitions, How to write unit symbols

·    Notes on Significant Figures, Rules for Countinmg Significant Digits, Rounding Off, Algebraic Operations  

Improve your Performance & Confidence through -

'India Study Solution MCQ & Objective Test Series’ with each set containing 10 important questions with hints & solutions for practice from the chapter Units, Dimensions, Measurements and Error Analysis

Measurement

What is Measurement?

Measurement is the comparison of a quantity with a standard of the same physical quantity. (How do we define Physical Quantity?) In other words, measurement of a physical quantity requires is comparison with an arbitrarily chosen, reference standard which is called unit of that quantity.

Measurement of Large Distances -

Large distances, for example distance between stars, planet are measured by indirect methods. Hence, an indirect method of measurement or making rough estimates of quantities using common observations is equally important.
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Parallax Method

Parallax can be defined as the apparent shift in the positron of a body with respect to a specific point on its background with the shift of eye. Let us understand this in this way -

Suppose we want to measure the distance of a very distant planet (P) using Parallax Method, we observe it from two different observatories (L & M) on the earth separated by a distance say, 'b' which is called "basis". Since the planet is too far, both the observatories L & M can be considered at nearly the distance from it. 

LP = MP = D (say). Also, 'b' is too less as compared to 'D'.

Thus LM can be approximately considered as an arc of length 'b' of a circle whose center less at P. The radius of the circle is then, D. So, the angle subtended by LM at P can be used to find D using the relation:

q = b / D 

Angle q is called the Parallax angle or parallactic angle and it should be taken in radian, not in degree.

After calculating the distance of the planet from the earth using Parallax Method, we can also calculate the size of the planet by using the following relation -

d = Df

Where, the angle f is the angular size or angular diameter of the planet.

Measurement of Very Small Distances -

Besides distance / length of normal magnitudes, we can do direct measurements of very small lengths (minute size) of the scale of molecular size using specific instruments like:

Optical Microscope - works in visible light & can resolve particles up to 10^-7 m.

Electron Microscope - uses electron beams focussed by electric and magnetic field, better resolution power than that of optical microscope, can measure as small as 0.6 x 10^–10 m.

Tunnelling Microscope - has better resolution power than electron microscope, can measure the size of a molecule.

Volumetric Method - this method is used to estimate the sizes of large molecules e.g., oleic acid.    

Measurement of Mass - 

Other Topics from this Chapter

Physical Quantities - Fundamental or Basic, Derived, Supplementary quantities

Units - International System of Units, SI Units, Properties and Definitions, Norms for writing Unit Symbols

Notes on Measurements

Significant Figures and its Rules, Rounding Off a Digit

Types and Definition of Errors, Errors in Measurement, Error Analysis

Dimensions, Dimensional Formulae, Dimensional Equation

Dimensional Analysis and its Applications

Mass is a measure of the quantity of matter present in a body. It is one of the basic properties of matter. Variations in conditions such as pressure, temperature, location, etc. do not change the mass of an object. We need to employ different methods to measure masses of different ranges. For example - 

Mass of Small Objects - We can use common balance, spring balance, pedestal balance etc. to find masses of common objects whereas, to estimate very small masses like molecular mass, we have to use analytical tools like Mass Spectrograph  

Mass of Terrestrial Objects - calculated mathematically using Newton’s Law of Gravitation

Also Read: Solved Objective Questions & Test Series on Newton’s Law of Gravitation

Table: Range or Order of Masses

Object	Range of Mass (kg)
Electron	10–30
Proton	10–27
Uranium atom	10–25
Red Blood Cell	10–13
A Dust Particle	10–9
Rain Drop	10–6
Human Body	102
Boeing 747 Aircraft	108
Moon	1023
Earth	1025
Sun	1030
Milky Way Galaxy	1041

Measurement of Time -

Any periodically recurring event can be used as a clock or as a standard of time. The periodic vibrations produced in a cesium atom serve as the most accurate standard of time. A cesium clock is also known as an Atomic Clock is based on these periodic vibrations. Atomic clocks have a high accuracy of ‘1 part in 10¹³’ i.e., they lose or gain no more than 3 ms (3x10^–6 s) in a year. The national standard time interval ‘second’ and its frequency is maintained with a set of four cesium atomic clocks.        

<< International System of Units, Properties, Definitions, Writing Unit Symbols 
          

Significant Figures, Rounding Off, Rules for Algebraic Operations >>

Units, Dimensions, Measurements and Error Analysis - Solved Test Series, Practice Questions

• Physics MCQ Test Series with Solutions for NEET, IITJEE, BTech, MBBS and BDS Entrance Exams - Units, Dimensions, Measurements and Error Analysis
• Units, Dimensions, Measurements and Error Analysis - Physics MCQ test series and practice questions for BTech, MBBS, BDS admission tests  
• Free online solved Test Series on Units, Dimensions, Measurements and Error Analysis - Physics questions answers for IIT JEE, NEET