I am studying inter 2nd year...as there is not much time left for jee...so can sombody advice me on scoring high...please..

JEE in comparison to NEET (ug) has many avenues and even if you qualify the exam you will make it through it and secure a seat for yourself.
All you need is dedication and focus.

Discipline yourself and revise the concepts. Mathematics is all about understanding, the better insight you have the better you score.
Focus on the core concepts of physics. Don't panic and grasp the easier concepts first, algebra, geometry, statistics probability. They twist the question but answer lies in the concepts.

While studying math donot overlook the other subjects , physics and chemistry are equally important.

Invest the little time you have properly and if you're determined on getting that seat, there is no force which can stop you but yourself.

Study hard , revisions are mandatory. It's always quality over quantity. Discipline and hardwork will get you the glory.

Goodluck.