The weightage doesn't depend on the session the exam is being conducted in, For example, in Physics, Modern Physics has the highest set of questions asked. 5 questions atleast are asked in this topic carrying a weightage of 20 marks. Topics like Heat and Dynamics, Optics, Current Electricity, Electrostatics carry 3 questions each with 12 marks. Magnetics has 2 questions from its section carrying 8 marks. The rest all have 1 question each with a weightage of 4 marks. Now this is based on previous years exam trends and this shall remain the same for both January and April sessions as well. For other subjects of JEE Main, please visit our page at: https://engineering.careers360.com/articles/jee-main-syllabus-weightage . We also have a JEE Main Knockout package that you can check at: https://learn.careers360.com/engineering/jee-main/