3rd year undergraduate at IIT Madras, IIT JEE Physics Tutor
This is rather a very general question. How to solve numericals in Physics? Well, a simple answer would be: like any other problem! If by numericals you mean specifically those problems which have 'numbers' in them, then they hardly different from any other problem in the Physics paper. The only difference is that some problems will have expressions as the answer and in others, you will be expected to evaluate those expressions by substituting the numerical values. So the question, as I understand it is, How to solve a problem? And the answer to this is not new or surprising. You'll have to have solid understanding of the principles first. This could be accomplished by reading books. There are articles on Spanedea about the books you could use. Then comes the 'solving' part. I would suggest you start out with simple and basic problems first to develop confidence and learn how to use the principle and concepts. If you get stuck, there is nothing wrong in looking up the solutions at this stage to find out where you went wrong. Once you are confident that you have understood the theory well enough, you could try attempting the tougher and complex problems. Hope this helps. Good luck!