Yes you can get clear to your syllabus through  NCERT ....as it has good explanation and a great concept for understanding

Or you can prepare your own notes for it and study it only...and there are many mock exams for it so that you can prepare for it...

Better luck!!!

The MHRD did announce that JEE Mains 2021 will be conducted with reduced syllabus. As of now the syllabus hasn't been officially released. So we shall give you information based on the existing syllabus. You need to know your syllabus and understand the exam pattern. Make a plan and stick to it. Make a note of the books to refer from and practise as many mock tests or sample papers as you can. Divide the syllabus into Class 11 and Class 12 and the topics as "Need to Learn", "Weak" and "Strong". Now it is important to check the weightage of each topic. In Physics, Modern Physics take the top slot with 5 questions. Heat and Thermodynamics, Optics, Current Electricity, Elcetrostatics get 3 questions each. Magnetic has 2 questions and the rest get 1 question each. In Chemistry, Transition Elements and Coordination Chemistry, Periodic Table and Representative elements take 3 questions slot. Thermodynamics and Gaseous state, Atomic structure, Chemical Bonding, Chemical and Iconic Equilibrium, Solid State and Surface Chemistry and Nuclear Chemistry and Environment get 2 questions slot eacch and the remaining get 1 question each.In Mathematics, Co-ordinate Geometry gets 5 questions. Limits, Continuity and Differentiability, Integral Calculus get 3 questions slot each. The rest get 2 and 1 questions slot. For complete breakdown, please read our article: https://engineering.careers360.com/articles/jee-main-syllabus-weightage . Once you complete a topic, try to practise the concepts and write down the important points and paste them somewhere that you can see. Practise questions from that topic. Refer to books like:

• NCERT
• Concepts of Physics by HC Verma
• Fundamentals of Physics by Halliday, Resnick and Walker
• Understanding Physics by DC Pandey
• Problems in General Physics by I.E.Irodov
• Understanding Physics by Freedman and Young
• Problems and Solution of Physics by Shasti Bhushan Tiwari