Hello Munna,

The only way to make Physics strong, is to practise more and more. I suggest you to solve good books, such as NCERT and start solving in ascending order, that means solve easy question's books first. Solve NCERT and then go for Concept of Physics by H.C. Verma, rather than jumping directly to H.C. Verma.

If you are preparing for JEE main, there are several books, you can solve, but solve in ascending order of diffivulty. Go for:

NCERT>School book(like Nootan Physics)>Arihant Publications Physics > Concept of Physics by H.C. Verma>Physics by I.E. Irodov=Resnick Hallisday book.

Hope this Helps