The physics syllabus for classes 11 and 12 is based on a fundamentally new domain. You do not need to consider about 11th physics if you are merely studying for the 12th board. It will have no bearing on your preparation for the board.

Physics is a study of basic laws of nature and their manifestation in different natural phenomena. Physics is the study of physical world and matter and its motion through space and time, along with related concepts such as energy and forced 

Yes, class 11 Physics syllabus is considered as the toughest of all the subjects by various students. It is very difficult, complex and comprehensive in comparison to class 10t syllabus for Physics.

There is no recipe for scoring 100% in Physics exam but anyone can score 100% in Physics exam with dedication, hard work and constant efforts. Physics questions can fetch you 100% marks as they are based on derivations, formulas and concepts.