JOINT ENTRANCE EXAMINATION (MAIN) 

JEE Main is a national-level entrance exam conducted by the National Testing Agency (NTA) in India for admission to undergraduate engineering and architecture courses in various institutes, including the Indian Institutes of Technology (IITs). The exam is usually conducted twice a year, in January and April.

The JEE Main exam consists of two papers: Paper 1 for B.E./B.Tech courses and Paper 2 for B.Arch/B.Planning courses. Paper 1 is a computer-based test that consists of multiple-choice questions from Physics, Chemistry, and Mathematics, while Paper 2 is also a computer-based test that consists of objective type questions from Mathematics, Aptitude, and Drawing.

The exam duration is 3 hours for both Paper 1 and Paper 2, and the number of questions, as well as the difficulty level, vary each year. The exam is conducted in multiple languages, including English, Hindi, and other regional languages.

The JEE Main exam is the first step for admission to engineering and architecture courses in various institutes across India, including the National Institutes of Technology (NITs), Indian Institutes of Information Technology (IIITs), and other government-funded technical institutions.

To be eligible for the JEE Main exam, candidates must have passed their 10+2 (or equivalent) examination with Physics, Chemistry, and Mathematics as compulsory subjects. The minimum age limit for appearing in the exam is 17 years.

In addition to JEE Main, candidates who wish to pursue engineering courses in the IITs also need to clear the JEE Advanced exam, which is conducted after the JEE Main exam.

To be eligible for JEE Main exam, a candidate must fulfill the following eligibility criteria:

1. Age Limit: There is no specific age limit for appearing in JEE Main exam. However, the candidate should have been born on or after October 1, 1998, to be eligible.

2. Educational Qualification: The candidate must have passed their 10+2 (or equivalent) examination with Physics, Chemistry, and Mathematics as compulsory subjects. Candidates who are appearing for their 10+2 examination can also apply for the JEE Main exam.

3. Year of Passing: Candidates who have passed their 10+2 examination in the year 2020, 2021, or are appearing in 2022 are eligible to apply for the JEE Main 2023 exam.

4. Number of Attempts: Candidates can attempt JEE Main for a maximum of 3 times in consecutive years.

5. Aadhaar Card: All Indian candidates must have an Aadhaar card to apply for JEE Main. However, candidates from Meghalaya, Assam, and Jammu & Kashmir can use their passport, ration card, bank account, or any other valid government identity card for the application process.

6. Subject Combinations: The candidate must have studied Physics, Chemistry, and Mathematics as compulsory subjects in their 10+2 (or equivalent) examination. Additionally, the candidate should have studied any one of the following subjects as an optional subject: Biology, Biotechnology, Chemistry, Computer Science, or any other technical vocational subject.

7. Percentage of Marks: There is no minimum percentage of marks required to appear for JEE Main exam. However, the candidate must have passed their 10+2 (or equivalent) examination with the above-mentioned subject combinations.

8. Foreign Candidates: Foreign candidates who wish to apply for JEE Main exam are not required to have an Aadhaar card. Instead, they can provide their passport number.

9. Diploma Holders: Candidates who have completed a diploma in engineering or technology can also apply for JEE Main exam. However, they will be eligible for admission to the second year of B.E./B.Tech courses, provided that they fulfill the eligibility criteria for the exam.

10. State of Eligibility: While filling out the JEE Main application form, candidates are required to enter their state of eligibility. This means that the candidate should have either passed their 10+2 (or equivalent) examination from the same state or should be a resident of the state. The state of eligibility is important for determining the state-specific eligibility criteria, reservation policies, and other state-level admission processes.

11. Number of Subjects in 10+2: Candidates who have appeared for the 10+2 (or equivalent) examination with four or more subjects can also apply for JEE Main. In this case, the candidate's top three subjects will be considered for calculating the final percentage of marks.

12. Minimum Age for IIT Admission: While there is no age limit for appearing in JEE Main, candidates must be below 25 years of age to be eligible for admission to undergraduate courses in the Indian Institutes of Technology (IITs). The age limit is relaxed by 5 years for candidates belonging to reserved categories.

13. Year of Passing 10+2: Candidates who have passed their 10+2 (or equivalent) examination in 2019 or earlier are not eligible to appear for JEE Main exam. The candidate should have passed their 10+2 examination in the year 2020, 2021, or should be appearing for the examination in 2022.

14. Mode of Education: Candidates who have passed their 10+2 (or equivalent) examination through distance learning or correspondence mode are also eligible to apply for JEE Main. However, such candidates are not eligible for admission to the Indian Institutes of Technology (IITs).

15. Nationality: Candidates can apply for JEE Main exam if they are Indian nationals, NRIs, PIOs, or OCIs. Candidates must note that the eligibility criteria may vary for different categories and admission policies of the participating institutes.

16. Attempts Limit: There is no limit to the number of attempts a candidate can take for JEE Main exam. However, since the exam is conducted twice a year, candidates can appear for a maximum of two attempts in a single academic year.

17. Aadhaar Card: While filling out the JEE Main application form, candidates are required to provide their Aadhaar card details. However, this is not mandatory for candidates who are from the states of Jammu & Kashmir, Meghalaya, and Assam. Candidates who do not have an Aadhaar card can provide their passport number, ration card number, bank account number, or any other valid government identity proof.

18. Reservation Policy: JEE Main follows the reservation policy of the Government of India for admission to the participating institutes. The reservation policy includes categories such as Scheduled Castes (SC), Scheduled Tribes (ST), Other Backward Classes (OBC), Persons with Disabilities (PwD), and more. Candidates belonging to the reserved categories are required to provide the necessary documents to claim the reservation benefits.

It is important for candidates to fulfill all the JEE Main eligibility criteria and provide accurate information while filling out the application form. Any discrepancy or incorrect information may lead to the disqualification of the candidate or rejection of the application. Therefore, candidates are advised to be cautious and seek guidance from reliable sources in case of any doubts or queries. 

The JEE Main syllabus is based on the syllabus of 10+2 level for Physics, Chemistry, and Mathematics. Here is a broad overview of the syllabus:

1. Physics:

   • Physics and measurement

   • Kinematics

   • Laws of motion

   • Work, energy, and power

   • Rotational motion

   • Gravitation

   • Properties of solids and liquids

   • Thermodynamics

   • Kinetic theory of gases

   • Oscillations and waves

   • Electrostatics

   • Current electricity

   • Magnetic effects of current and magnetism

   • Electromagnetic induction and alternating currents

   • Electromagnetic waves

   • Optics

   • Dual nature of matter and radiation

   • Atoms and nuclei

   • Electronic devices

2. Chemistry:

   • Physical Chemistry:

     • Some basic concepts in chemistry

     • States of matter

     • Atomic structure

     • Chemical bonding and molecular structure

     • Chemical thermodynamics

     • Solutions

     • Equilibrium

     • Redox reactions and electrochemistry

     • Chemical kinetics

   • Inorganic Chemistry:

     • Classification of elements and periodicity in properties

     • General principles and processes of isolation of metals

     • Hydrogen

     • Block elements (alkali and alkaline earth metals)

     • P block elements

     • D and f block elements

     • Coordination compounds

   • Organic Chemistry:

     • Purification and characterization of organic compounds

     • Some basic principles of organic chemistry

     • Hydrocarbons

     • Organic compounds containing halogens

     • Organic compounds containing oxygen

     • Organic compounds containing nitrogen

     • Polymers

     • Biomolecules

     • Chemistry in everyday life

3. Mathematics:

   • Sets, relations, and functions

   • Complex numbers and quadratic equations

   • Matrices and determinants

   • Mathematical induction

   • Permutations and combinations

   • Mathematical reasoning

   • Limits, continuity, and differentiability

   • Integral calculus

   • Differential equations

   • Co-ordinate geometry

   • Three-dimensional geometry

   • Vector algebra

   • Statistics and probability

   • Trigonometry

NIT stands for National Institute of Technology, and these are a group of engineering colleges in India that offer undergraduate, postgraduate and doctoral programs in various disciplines of engineering, technology, and management. There are a total of 31 NITs in India, and all of them are funded by the Government of India.

Here is a list of NIT colleges in India:

1. National Institute of Technology, Tiruchirappalli

2. National Institute of Technology, Surathkal

3. National Institute of Technology, Warangal

4. National Institute of Technology, Calicut

5. National Institute of Technology, Rourkela

6. National Institute of Technology, Kurukshetra

7. National Institute of Technology, Jamshedpur

8. National Institute of Technology, Durgapur

9. National Institute of Technology, Allahabad

10. National Institute of Technology, Bhopal

11. National Institute of Technology, Jalandhar

12. National Institute of Technology, Hamirpur

13. National Institute of Technology, Raipur

14. National Institute of Technology, Silchar

15. National Institute of Technology, Agartala

16. National Institute of Technology, Srinagar

17. National Institute of Technology, Meghalaya

18. National Institute of Technology, Arunachal Pradesh

19. National Institute of Technology, Delhi

20. National Institute of Technology, Manipur

21. National Institute of Technology, Mizoram

22. National Institute of Technology, Nagaland

23. National Institute of Technology, Puducherry

24. National Institute of Technology, Goa

25. National Institute of Technology, Sikkim

26. National Institute of Technology, Andhra Pradesh

27. National Institute of Technology, Uttarakhand

28. National Institute of Technology, Mizoram

29. National Institute of Technology, Karnataka

30. National Institute of Technology, Tripura

31. National Institute of Technology, Arunachal Pradesh

These NIT colleges have a great reputation for providing quality education and excellent infrastructure facilities to students. Admission to these institutes is based on the candidate's JEE Main score, and further selection criteria such as counseling, seat allotment, and document verification.