What are the topic we need to study for iit jam... should we need to study nuclear fission or upto decay is enough for iit jam

I suggest you that first study my subjects which contains weightage like mp, modern Physics, ED, classical,these are important.. nuclear is too important but sometimes no question ...

if u have very good command in mathematical physics then you should go with quantum physics. coMplete qm because it covers a large area or question paper. then we should prepare cl...