I had completed 12 with 66% only, I am interested in electronics subject.which are the course includes electronic subject for minimum years?
You can do B.tech in electronics and communication which for 4 years.You can further do your M.tech in any specialization of your interest.As per your question you haven't given any information about your home state, which group you have studied in your 10+2 and whether you have taken any entrance exam but you have to give entrance exam like JEE mains or other exams like your state board entrance exam to get admission in an Engineering college.
I hope this helps you.
All the best!