At present i an studying diploma course at NIRMA UNIVERSITY, AHMEDABAD.Am i eligible to give IIT-JEE after four years? i have just passed 10th standard how i can start my primary preparations for this exam

You are eligible for JEE if you are attending a :

3 or 4 year Diploma recognized by AICTE or a state Board of technical education. In case the relevant qualifying examination is not a public examination, the candidate must have passed at least one public (Board or Pre-University) examination at an earlier level.

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Some of you might start studying lightly after 10th as 11th is not a board class.

Here is my suggestion to you that you must join an IIT-JEE based institute which helps students to prepare for IIT exam.Some of them are Vidya mandir , FIIT-JEE etc.

Don't waste your time. It's about your own career.

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regards

Ramesh