JAM

Your rank should be under 30.

EMT DJ Griffiths
Thermal Physics Garg Bansal and Gosh
Classical Mechanics Klepner and Kolenkow
Madhya Pradesh HK dass
Quantum mechanics Arthur Beiser.

Please check the last year's cutoff so that you can get best idea for your admission.

If you are among top 5 student of Your department/College then you can apply in IIT Gandhinagar on the basis of merit. Search IIT Gandhinagar early admit programme, there you will get information. Also IIT mandi offers admission without jam.

Your whole six semester marks will be considered.

If you are speaking about Du then for it either you have B.Sc. Phy from Du itself so that if you have high marks then you could clear on merit basis or need to clear DU entrance exam. Jam score is not required for Du. On jam website they have mentioned about the institute where jam score is valid.

It depends for which subject one wants to give IIT JAM paper, every year jam conducting organizations release eligibility criteria.

It all depends every platform is good but Career endeavor has its own fame and produces excellent results every year.

If you want to give jam exam for M.Sc. Maths then just google IIT JAM Roorkee there you will saw application page from there download the brochure and check the eligibility and then apply.