Hi,

Since I had given my physics exam just two years ago and according to the previous year papers as well, there has been a certain pattern of theory and numericals ratio.

Majorly, numericals make up a huge chunk of marks in CBSE exam for Physics. Since you have to use derivations and formulae for solving numericals they come under this usage as well.

The derivations are equally important since you can easily memorize the steps, so do not miss on this portion.

Here is the link to previous year question papers for CBSE 12th Physics. You can follow the given steps to download the question papers to see the weightage given to derivations and numericals -

https://www.google.com/amp/s/school.careers360.com/boards/cbse/cbse-previous-year-question-papers-class-12-physics/amp

Hope this was of some help!