Hello Ravi

Admission to B.Tech programmes in IIST is done on the basis of JEE Advanced scores. You will have to first appear and qualify the JEE Main exam and then JEE Advanced exam.
Go through the link below to check the detailed information-
https://engineering.careers360.com/articles/iist-btech-admission

Good Luck!

If you go through the eligibility criteria then in the eligibility criteria they made  it clear that a candidate belonging to general OBC category must have 75% mark in 12th which include subjects physics chemistry mathematics one language and one any other subject therefore there is no such rule on top 20 percentile so to able to get admission into IISC you must score 75% in class 12th.

For more details on eligibility criteria please visit the link given below

https://www.google.com/amp/s/engineering.careers360.com/articles/iist-btech-admission/amp

Hello Sai,

IIST Admission is the graduate entrance examination which is conducted by Indian Institute of Space Science and Technology. Candidates who are willing to get their graduation degree in B.Tech/M. Tech courses are supposed to give IIST Admission entrance examination. IST Admission is for the undergraduate course.

Registration starts 22nd May 2019

Last date for registration 5th June 2019

Eligibility for UG Courses (B.Tech):

• Candidates must be an Indian Nationals.
• Students must have born on or after 1st October 1994 (for general & OBC) and 1st October 1989 (for reserved categories).
• Candidates should have passed 12th or equivalent exam with PCM subjects from any recognized board.
• In the qualifying exam, students should have obtained at least 75% (65% marks for reserved categories).
• Candidates also have qualified the JEE Main & JEE Advanced 2019 examination.

Eligibility for PG Courses:

• Candidates should be an Indian citizen.
• The maximum age limit is 32 years as on 30th April 2018 for general candidates. For SC/ST and PD candidates, age relaxation will be applicable as per Government of India orders.
• Candidates must have qualified BE, B.Tech, MS, M.Sc. or equivalent degree.
• Candidates should have secured minimum 60% marks or 6.5 CGPA (55% marks or 6.0 CGPA for reserved categories).
• Valid score card of GATE/JEST/UGC NET exam in the relevant field.

Good luck!

You must get how much ever marks you can to score your best. 

Last year the cut off for JEE Mains was 74 on 360. But for getting admission in NITs, IIITs or GFTIs across India one must achieve above 180. 

For getting admission in IITs across India one must clear JEE Mains along with securing high rank in JEE Advance to get branch of your choice. 

If you still have any queries feel free to ask in the comment section down below. 

Dear Athira, the following is the list of post graduation courses at IIST. https://www.iist.ac.in/academics/curricula

Most of the eligibility criteria is that the candidate should have completed B.E/B.Tech or a M.Sc/MS for specialisation in relavent courses. Unfortunately a graduation in Physics is no where mentioned as the eligibility criteria. Here is the link for your confirmation: https://www.iist.ac.in/admissions/postgraduate/regular

hello vinumohan,

yes, you need to clear/get qualified through jee advance to earn admission in IIST.before jee advanced,you need to get qualify through jee mains also.

to know more,

https://engineering.careers360.com/articles/iist-btech-admission

all the best!

I Hope this information will be useful to you.

if you need additional information,let us know to help you.

Thank you!!!:)