JAM Exam is one of the toughest exams. So, the best way to prepare for the exam is solving previous year IIT JAM Question Papers
. This will give you an idea about the pattern and difficulty level of the questions.
You should also take online mock tests. This will help you analyze your level of preparation and also increase your speed and accuracy.
You should first study the most important topics of JAM Physics. Below are the most important topics of Physics:
1. Quantum Mechanics
2. Mathematical Physics
3. Classical Mechanics (Lagrangian and Hamiltonian formalism)
4. Nuclear Physics
So, you should give more time to these topics.