Hi rubal,
As your 12th marks is not that great you may will face some problems in getting good colleges so i will recommend you to apply for the 12th improvement examination and score a decent marks to get eligible for top colleges.
All the best.

Dear Rubal, you haven't mentioned the aggregate that you scored. For most Entrance Examinations, the minimum aggregate required is 50% for General Category Students. Its lesser for Reserved Category Students. So though you have scored only grace marks in Physics, if your aggregate is 50% or more, then you can appear for Entrance Examinations. To get into Engineering, your score and rank in the Entrance Examination matters the most and not you 10+2 marks. And so you can appear for the CET of your State. If you have any Entrance Examination in mind, do let us know and we will check the eligibility criteria for you.