Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Ghost.
For whole mathematical physics syllabus covered in JAM SYLLABUS you can follow 1)vector calculus- D.J. GRIFFITH ( E.M.T) mathematical section only. MATHEMATICAL PHYSICS BY- 2) ARFKEN ,WEBER( PERSONAL FAVOURITE) 3) Riley and Hobson. 4) Jon Mathews. You can follow these books for detailed information of topic, these books will give a concept behind all the topics rather than just doing calculation stuff, E-copies of all these book are available on internet, just decide your topic and read from these books, it will more than enough not only for your jam exams but also for others exams after Msc(GATE, CSIR-NET,ETC). Wishes.